diff --git a/.babelrc b/.babelrc
index 1320b9a3..eeeb0e93 100644
--- a/.babelrc
+++ b/.babelrc
@@ -1,3 +1,8 @@
 {
-  "presets": ["@babel/preset-env"]
-}
+  "presets": [
+    "@babel/preset-env"
+  ],
+  "plugins": [
+    "@babel/plugin-proposal-class-properties"
+  ]
+}
\ No newline at end of file
diff --git a/.env b/.env
new file mode 100644
index 00000000..df0c9c2d
--- /dev/null
+++ b/.env
@@ -0,0 +1 @@
+ANALISYS_DAYS_INTERVAL=30
\ No newline at end of file
diff --git a/index.js b/index.js
index 525c9de1..19325b68 100644
--- a/index.js
+++ b/index.js
@@ -1,26 +1,7 @@
-import { Drug, Pharmacy } from "./pharmacy";
-import fs from "fs";
+"use strict";
 
-const drugs = [
-  new Drug("Doliprane", 20, 30),
-  new Drug("Herbal Tea", 10, 5),
-  new Drug("Fervex", 5, 40),
-  new Drug("Magic Pill", 15, 40)
-];
-const trial = new Pharmacy(drugs);
+import { items } from "./src/data";
+import { Manage } from "./src/services/manage";
 
-const log = [];
-
-for (let elapsedDays = 0; elapsedDays < 30; elapsedDays++) {
-  log.push(JSON.stringify(trial.updateBenefitValue()));
-}
-
-/* eslint-disable no-console */
-fs.writeFile("output.txt", log.toString(), err => {
-  if (err) {
-    console.log("error");
-  } else {
-    console.log("success");
-  }
-});
-/* eslint-enable no-console */
+const manage = new Manage(items);
+manage.process();
diff --git a/package-lock.json b/package-lock.json
index bc5577d3..0cff30a5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
         "@babel/cli": "^7.1.0",
         "@babel/core": "^7.1.0",
         "@babel/node": "^7.0.0",
+        "@babel/plugin-proposal-class-properties": "^7.16.7",
         "@babel/preset-env": "^7.1.0",
         "babel-core": "^7.0.0-bridge.0",
         "babel-eslint": "^9.0.0",
@@ -154,12 +155,15 @@
       }
     },
     "node_modules/@babel/helper-annotate-as-pure": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0.tgz",
-      "integrity": "sha512-3UYcJUj9kvSLbLbUIfQTqzcy5VX7GRZ/CCDrnOaZorFFM01aXp1+GJwuFGV4NDDoAS+mOUyHcO6UD/RfqOks3Q==",
+      "version": "7.16.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.16.7.tgz",
+      "integrity": "sha512-s6t2w/IPQVTAET1HitoowRGXooX8mCgtuP5195wD/QJPV6wYjpujCGF7JuMODVX2ZAJOf1GT6DT9MHEZvLOFSw==",
       "dev": true,
       "dependencies": {
-        "@babel/types": "^7.0.0"
+        "@babel/types": "^7.16.7"
+      },
+      "engines": {
+        "node": ">=6.9.0"
       }
     },
     "node_modules/@babel/helper-builder-binary-assignment-operator-visitor": {
@@ -210,6 +214,27 @@
         "semver": "bin/semver.js"
       }
     },
+    "node_modules/@babel/helper-create-class-features-plugin": {
+      "version": "7.17.9",
+      "resolved": "https://registry.npmjs.org/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.17.9.tgz",
+      "integrity": "sha512-kUjip3gruz6AJKOq5i3nC6CoCEEF/oHH3cp6tOZhB+IyyyPyW0g1Gfsxn3mkk6S08pIA2y8GQh609v9G/5sHVQ==",
+      "dev": true,
+      "dependencies": {
+        "@babel/helper-annotate-as-pure": "^7.16.7",
+        "@babel/helper-environment-visitor": "^7.16.7",
+        "@babel/helper-function-name": "^7.17.9",
+        "@babel/helper-member-expression-to-functions": "^7.17.7",
+        "@babel/helper-optimise-call-expression": "^7.16.7",
+        "@babel/helper-replace-supers": "^7.16.7",
+        "@babel/helper-split-export-declaration": "^7.16.7"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      },
+      "peerDependencies": {
+        "@babel/core": "^7.0.0"
+      }
+    },
     "node_modules/@babel/helper-define-map": {
       "version": "7.5.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-define-map/-/helper-define-map-7.5.5.tgz",
@@ -244,14 +269,13 @@
       }
     },
     "node_modules/@babel/helper-function-name": {
-      "version": "7.16.7",
-      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.16.7.tgz",
-      "integrity": "sha512-QfDfEnIUyyBSR3HtrtGECuZ6DAyCkYFp7GHl75vFtTnn6pjKeK0T1DB5lLkFvBea8MdaiUABx3osbgLyInoejA==",
+      "version": "7.17.9",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.17.9.tgz",
+      "integrity": "sha512-7cRisGlVtiVqZ0MW0/yFB4atgpGLWEHUVYnb448hZK4x+vih0YO5UoS11XIYtZYqHd0dIPMdUSv8q5K4LdMnIg==",
       "dev": true,
       "dependencies": {
-        "@babel/helper-get-function-arity": "^7.16.7",
         "@babel/template": "^7.16.7",
-        "@babel/types": "^7.16.7"
+        "@babel/types": "^7.17.0"
       },
       "engines": {
         "node": ">=6.9.0"
@@ -282,12 +306,15 @@
       }
     },
     "node_modules/@babel/helper-member-expression-to-functions": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.5.5.tgz",
-      "integrity": "sha512-5qZ3D1uMclSNqYcXqiHoA0meVdv+xUEex9em2fqMnrk/scphGlGgg66zjMrPJESPwrFJ6sbfFQYUSa0Mz7FabA==",
+      "version": "7.17.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.17.7.tgz",
+      "integrity": "sha512-thxXgnQ8qQ11W2wVUObIqDL4p148VMxkt5T/qpN5k2fboRyzFGFmKsTGViquyM5QHKUy48OZoca8kw4ajaDPyw==",
       "dev": true,
       "dependencies": {
-        "@babel/types": "^7.5.5"
+        "@babel/types": "^7.17.0"
+      },
+      "engines": {
+        "node": ">=6.9.0"
       }
     },
     "node_modules/@babel/helper-module-imports": {
@@ -322,12 +349,15 @@
       }
     },
     "node_modules/@babel/helper-optimise-call-expression": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.0.0.tgz",
-      "integrity": "sha512-u8nd9NQePYNQV8iPWu/pLLYBqZBa4ZaY1YWRFMuxrid94wKI1QNt67NEZ7GAe5Kc/0LLScbim05xZFWkAdrj9g==",
+      "version": "7.16.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.16.7.tgz",
+      "integrity": "sha512-EtgBhg7rd/JcnpZFXpBy0ze1YRfdm7BnBX4uKMBd3ixa3RGAE002JZB66FJyNH7g0F38U05pXmA5P8cBh7z+1w==",
       "dev": true,
       "dependencies": {
-        "@babel/types": "^7.0.0"
+        "@babel/types": "^7.16.7"
+      },
+      "engines": {
+        "node": ">=6.9.0"
       }
     },
     "node_modules/@babel/helper-plugin-utils": {
@@ -362,15 +392,19 @@
       }
     },
     "node_modules/@babel/helper-replace-supers": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.5.5.tgz",
-      "integrity": "sha512-XvRFWrNnlsow2u7jXDuH4jDDctkxbS7gXssrP4q2nUD606ukXHRvydj346wmNg+zAgpFx4MWf4+usfC93bElJg==",
+      "version": "7.16.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.16.7.tgz",
+      "integrity": "sha512-y9vsWilTNaVnVh6xiJfABzsNpgDPKev9HnAgz6Gb1p6UUwf9NepdlsV7VXGCftJM+jqD5f7JIEubcpLjZj5dBw==",
       "dev": true,
       "dependencies": {
-        "@babel/helper-member-expression-to-functions": "^7.5.5",
-        "@babel/helper-optimise-call-expression": "^7.0.0",
-        "@babel/traverse": "^7.5.5",
-        "@babel/types": "^7.5.5"
+        "@babel/helper-environment-visitor": "^7.16.7",
+        "@babel/helper-member-expression-to-functions": "^7.16.7",
+        "@babel/helper-optimise-call-expression": "^7.16.7",
+        "@babel/traverse": "^7.16.7",
+        "@babel/types": "^7.16.7"
+      },
+      "engines": {
+        "node": ">=6.9.0"
       }
     },
     "node_modules/@babel/helper-simple-access": {
@@ -501,6 +535,22 @@
         "@babel/core": "^7.0.0-0"
       }
     },
+    "node_modules/@babel/plugin-proposal-class-properties": {
+      "version": "7.16.7",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.16.7.tgz",
+      "integrity": "sha512-IobU0Xme31ewjYOShSIqd/ZGM/r/cuOz2z0MDbNrhF5FW+ZVgi0f2lyeoj9KFPDOAqsYxmLWZte1WOwlvY9aww==",
+      "dev": true,
+      "dependencies": {
+        "@babel/helper-create-class-features-plugin": "^7.16.7",
+        "@babel/helper-plugin-utils": "^7.16.7"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      },
+      "peerDependencies": {
+        "@babel/core": "^7.0.0-0"
+      }
+    },
     "node_modules/@babel/plugin-proposal-dynamic-import": {
       "version": "7.5.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-dynamic-import/-/plugin-proposal-dynamic-import-7.5.0.tgz",
@@ -9148,12 +9198,12 @@
       }
     },
     "@babel/helper-annotate-as-pure": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0.tgz",
-      "integrity": "sha512-3UYcJUj9kvSLbLbUIfQTqzcy5VX7GRZ/CCDrnOaZorFFM01aXp1+GJwuFGV4NDDoAS+mOUyHcO6UD/RfqOks3Q==",
+      "version": "7.16.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.16.7.tgz",
+      "integrity": "sha512-s6t2w/IPQVTAET1HitoowRGXooX8mCgtuP5195wD/QJPV6wYjpujCGF7JuMODVX2ZAJOf1GT6DT9MHEZvLOFSw==",
       "dev": true,
       "requires": {
-        "@babel/types": "^7.0.0"
+        "@babel/types": "^7.16.7"
       }
     },
     "@babel/helper-builder-binary-assignment-operator-visitor": {
@@ -9197,6 +9247,21 @@
         }
       }
     },
+    "@babel/helper-create-class-features-plugin": {
+      "version": "7.17.9",
+      "resolved": "https://registry.npmjs.org/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.17.9.tgz",
+      "integrity": "sha512-kUjip3gruz6AJKOq5i3nC6CoCEEF/oHH3cp6tOZhB+IyyyPyW0g1Gfsxn3mkk6S08pIA2y8GQh609v9G/5sHVQ==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-annotate-as-pure": "^7.16.7",
+        "@babel/helper-environment-visitor": "^7.16.7",
+        "@babel/helper-function-name": "^7.17.9",
+        "@babel/helper-member-expression-to-functions": "^7.17.7",
+        "@babel/helper-optimise-call-expression": "^7.16.7",
+        "@babel/helper-replace-supers": "^7.16.7",
+        "@babel/helper-split-export-declaration": "^7.16.7"
+      }
+    },
     "@babel/helper-define-map": {
       "version": "7.5.5",
       "resolved": "https://registry.npmjs.org/@babel/helper-define-map/-/helper-define-map-7.5.5.tgz",
@@ -9228,14 +9293,13 @@
       }
     },
     "@babel/helper-function-name": {
-      "version": "7.16.7",
-      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.16.7.tgz",
-      "integrity": "sha512-QfDfEnIUyyBSR3HtrtGECuZ6DAyCkYFp7GHl75vFtTnn6pjKeK0T1DB5lLkFvBea8MdaiUABx3osbgLyInoejA==",
+      "version": "7.17.9",
+      "resolved": "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.17.9.tgz",
+      "integrity": "sha512-7cRisGlVtiVqZ0MW0/yFB4atgpGLWEHUVYnb448hZK4x+vih0YO5UoS11XIYtZYqHd0dIPMdUSv8q5K4LdMnIg==",
       "dev": true,
       "requires": {
-        "@babel/helper-get-function-arity": "^7.16.7",
         "@babel/template": "^7.16.7",
-        "@babel/types": "^7.16.7"
+        "@babel/types": "^7.17.0"
       }
     },
     "@babel/helper-get-function-arity": {
@@ -9257,12 +9321,12 @@
       }
     },
     "@babel/helper-member-expression-to-functions": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.5.5.tgz",
-      "integrity": "sha512-5qZ3D1uMclSNqYcXqiHoA0meVdv+xUEex9em2fqMnrk/scphGlGgg66zjMrPJESPwrFJ6sbfFQYUSa0Mz7FabA==",
+      "version": "7.17.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.17.7.tgz",
+      "integrity": "sha512-thxXgnQ8qQ11W2wVUObIqDL4p148VMxkt5T/qpN5k2fboRyzFGFmKsTGViquyM5QHKUy48OZoca8kw4ajaDPyw==",
       "dev": true,
       "requires": {
-        "@babel/types": "^7.5.5"
+        "@babel/types": "^7.17.0"
       }
     },
     "@babel/helper-module-imports": {
@@ -9291,12 +9355,12 @@
       }
     },
     "@babel/helper-optimise-call-expression": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.0.0.tgz",
-      "integrity": "sha512-u8nd9NQePYNQV8iPWu/pLLYBqZBa4ZaY1YWRFMuxrid94wKI1QNt67NEZ7GAe5Kc/0LLScbim05xZFWkAdrj9g==",
+      "version": "7.16.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.16.7.tgz",
+      "integrity": "sha512-EtgBhg7rd/JcnpZFXpBy0ze1YRfdm7BnBX4uKMBd3ixa3RGAE002JZB66FJyNH7g0F38U05pXmA5P8cBh7z+1w==",
       "dev": true,
       "requires": {
-        "@babel/types": "^7.0.0"
+        "@babel/types": "^7.16.7"
       }
     },
     "@babel/helper-plugin-utils": {
@@ -9328,15 +9392,16 @@
       }
     },
     "@babel/helper-replace-supers": {
-      "version": "7.5.5",
-      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.5.5.tgz",
-      "integrity": "sha512-XvRFWrNnlsow2u7jXDuH4jDDctkxbS7gXssrP4q2nUD606ukXHRvydj346wmNg+zAgpFx4MWf4+usfC93bElJg==",
+      "version": "7.16.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.16.7.tgz",
+      "integrity": "sha512-y9vsWilTNaVnVh6xiJfABzsNpgDPKev9HnAgz6Gb1p6UUwf9NepdlsV7VXGCftJM+jqD5f7JIEubcpLjZj5dBw==",
       "dev": true,
       "requires": {
-        "@babel/helper-member-expression-to-functions": "^7.5.5",
-        "@babel/helper-optimise-call-expression": "^7.0.0",
-        "@babel/traverse": "^7.5.5",
-        "@babel/types": "^7.5.5"
+        "@babel/helper-environment-visitor": "^7.16.7",
+        "@babel/helper-member-expression-to-functions": "^7.16.7",
+        "@babel/helper-optimise-call-expression": "^7.16.7",
+        "@babel/traverse": "^7.16.7",
+        "@babel/types": "^7.16.7"
       }
     },
     "@babel/helper-simple-access": {
@@ -9434,6 +9499,16 @@
         "@babel/plugin-syntax-async-generators": "^7.2.0"
       }
     },
+    "@babel/plugin-proposal-class-properties": {
+      "version": "7.16.7",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.16.7.tgz",
+      "integrity": "sha512-IobU0Xme31ewjYOShSIqd/ZGM/r/cuOz2z0MDbNrhF5FW+ZVgi0f2lyeoj9KFPDOAqsYxmLWZte1WOwlvY9aww==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-create-class-features-plugin": "^7.16.7",
+        "@babel/helper-plugin-utils": "^7.16.7"
+      }
+    },
     "@babel/plugin-proposal-dynamic-import": {
       "version": "7.5.0",
       "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-dynamic-import/-/plugin-proposal-dynamic-import-7.5.0.tgz",
diff --git a/package.json b/package.json
index 93cdff60..8e60d8c4 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,7 @@
     "@babel/cli": "^7.1.0",
     "@babel/core": "^7.1.0",
     "@babel/node": "^7.0.0",
+    "@babel/plugin-proposal-class-properties": "^7.16.7",
     "@babel/preset-env": "^7.1.0",
     "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^9.0.0",
diff --git a/pharmacy.js b/pharmacy.js
index cda44c41..875817c9 100644
--- a/pharmacy.js
+++ b/pharmacy.js
@@ -1,3 +1,5 @@
+"use strict";
+
 export class Drug {
   constructor(name, expiresIn, benefit) {
     this.name = name;
@@ -11,54 +13,58 @@ export class Pharmacy {
     this.drugs = drugs;
   }
   updateBenefitValue() {
+    let name;
+    let benefit;
+    let expiresIn;
     for (var i = 0; i < this.drugs.length; i++) {
-      if (
-        this.drugs[i].name != "Herbal Tea" &&
-        this.drugs[i].name != "Fervex"
-      ) {
-        if (this.drugs[i].benefit > 0) {
-          if (this.drugs[i].name != "Magic Pill") {
-            this.drugs[i].benefit = this.drugs[i].benefit - 1;
+      name = this.drugs[i].name;
+      benefit = this.drugs[i].benefit;
+      expiresIn = this.drugs[i].expiresIn;
+
+      // "Magic Pill" never expires nor decreases in Benefit
+      if (name != "Magic Pill") {
+        if (
+          name != "Herbal Tea" &&
+          name != "Fervex"
+        ) {
+          if (benefit > 0) {
+            benefit--;
+            if (name == "Dafalgan") {
+              benefit--;
+            }
           }
-        }
-      } else {
-        if (this.drugs[i].benefit < 50) {
-          this.drugs[i].benefit = this.drugs[i].benefit + 1;
-          if (this.drugs[i].name == "Fervex") {
-            if (this.drugs[i].expiresIn < 11) {
-              if (this.drugs[i].benefit < 50) {
-                this.drugs[i].benefit = this.drugs[i].benefit + 1;
+        } else {
+          if (benefit < 50) {
+            benefit++;
+            if (name == "Fervex") {
+              if (expiresIn < 11) {
+                benefit++;
               }
-            }
-            if (this.drugs[i].expiresIn < 6) {
-              if (this.drugs[i].benefit < 50) {
-                this.drugs[i].benefit = this.drugs[i].benefit + 1;
+              if (expiresIn < 6) {
+                benefit++;
               }
             }
           }
         }
-      }
-      if (this.drugs[i].name != "Magic Pill") {
-        this.drugs[i].expiresIn = this.drugs[i].expiresIn - 1;
-      }
-      if (this.drugs[i].expiresIn < 0) {
-        if (this.drugs[i].name != "Herbal Tea") {
-          if (this.drugs[i].name != "Fervex") {
-            if (this.drugs[i].benefit > 0) {
-              if (this.drugs[i].name != "Magic Pill") {
-                this.drugs[i].benefit = this.drugs[i].benefit - 1;
-              }
+
+        if (expiresIn > 0) expiresIn--;
+
+        if (expiresIn < 0) {
+          if (name == "Herbal Tea") {
+            if (benefit < 50) {
+              benefit = benefit + 2;
             }
-          } else {
-            this.drugs[i].benefit =
-              this.drugs[i].benefit - this.drugs[i].benefit;
           }
-        } else {
-          if (this.drugs[i].benefit < 50) {
-            this.drugs[i].benefit = this.drugs[i].benefit + 1;
+
+          if (name == "Fervex") {
+            benefit = 0
           }
         }
       }
+
+      this.drugs[i].name = name;
+      this.drugs[i].expiresIn = expiresIn;
+      this.drugs[i].benefit = benefit;
     }
 
     return this.drugs;
diff --git a/src/data.js b/src/data.js
new file mode 100644
index 00000000..6c4ea749
--- /dev/null
+++ b/src/data.js
@@ -0,0 +1,29 @@
+"use strict";
+
+export const items = [
+  {
+    name: "Doliprane",
+    expiresIn: 20,
+    benefit: 30
+  },
+  {
+    name: "Herbal Tea",
+    expiresIn: 10,
+    benefit: 5
+  },
+  {
+    name: "Fervex",
+    expiresIn: 5,
+    benefit: 40
+  },
+  {
+    name: "Magic Pill",
+    expiresIn: 15,
+    benefit: 40
+  },
+  {
+    name: "Dafalgan",
+    expiresIn: 15,
+    benefit: 20
+  },
+];
\ No newline at end of file
diff --git a/src/helpers/logger.js b/src/helpers/logger.js
new file mode 100644
index 00000000..b673f75b
--- /dev/null
+++ b/src/helpers/logger.js
@@ -0,0 +1,32 @@
+"use strict";
+
+import fs from "fs";
+
+class LoggerError extends Error {
+  constructor(error) {
+    super();
+    this.message = error;
+  }
+}
+
+export class Logger {
+  _log;
+
+  pushLog(log) {
+    this._log = log;
+  }
+
+  writeLog() {
+    try {
+      fs.writeFile("output.txt", this._log.toString(), err => {
+        if (err) {
+          console.log("error");
+        } else {
+          console.log("success");
+        }
+      });
+    } catch (e) {
+      return new LoggerError(e);
+    }
+  }
+}
diff --git a/src/helpers/logger.spec.js b/src/helpers/logger.spec.js
new file mode 100644
index 00000000..e8586536
--- /dev/null
+++ b/src/helpers/logger.spec.js
@@ -0,0 +1,35 @@
+"use strict";
+
+import { Logger } from "./logger";
+
+describe("Logger helper", () => {
+  let service;
+
+  const mockLog = [{
+    name: "Doliprane",
+    expiresIn: 20,
+    benefit: 30
+  }];
+
+  beforeEach(() => {
+    service = new Logger();
+    service._log = []
+  });
+
+  describe("#pushLog", () => {
+    it("should push a log", () => {
+      service.pushLog(mockLog);
+      expect(service._log).toEqual(mockLog);
+    });
+  });
+
+  describe("#writeLog", () => {
+    beforeEach(() => {
+      service._log = mockLog;
+    });
+    it("Job is fulfilled", () => {
+      expect(service.writeLog).toBeTruthy();
+    });
+  });
+
+});
\ No newline at end of file
diff --git a/src/services/manage.js b/src/services/manage.js
new file mode 100644
index 00000000..b075da33
--- /dev/null
+++ b/src/services/manage.js
@@ -0,0 +1,38 @@
+"use strict";
+
+import { Drug, Pharmacy } from "../../pharmacy";
+import { Logger } from "../helpers/logger";
+
+class ManageError extends Error {
+  constructor(error) {
+    super();
+    this.message = error;
+  }
+}
+
+export class Manage extends Logger {
+  _pharmacy;
+
+  constructor(items) {
+    super();
+    this._buildinventory(items)
+  }
+
+  _buildinventory(items) {
+    const drugs = items.map(item => new Drug(item.name, item.expiresIn, item.benefit));
+    this._pharmacy = new Pharmacy(drugs);
+  }
+
+  process() {
+    const delay = process.env.ANALISYS_DAYS_INTERVAL || 30;
+    try {
+      for (let elapsedDays = 0; elapsedDays < delay; elapsedDays++) {
+        const output = this._pharmacy.updateBenefitValue();
+        this.pushLog(JSON.stringify(output));
+      }
+      this.writeLog();
+    } catch (e) {
+      return new ManageError(e);
+    }
+  }
+}
\ No newline at end of file
diff --git a/src/services/manage.spec.js b/src/services/manage.spec.js
new file mode 100644
index 00000000..104b12b4
--- /dev/null
+++ b/src/services/manage.spec.js
@@ -0,0 +1,45 @@
+"use strict";
+
+import { Manage } from "./manage";
+
+describe("Logger helper", () => {
+  let service;
+
+  const mockDataItems = [
+    {
+      name: "Drug1",
+      expiresIn: 5,
+      benefit: 40
+    },
+    {
+      name: "Drug2",
+      expiresIn: 15,
+      benefit: 40
+    }
+  ];
+
+  beforeEach(() => {
+    service = new Manage(mockDataItems);
+  });
+
+  describe("On class init", () => {
+    it("should call #_buildinventory", () => {
+      expect(service._pharmacy).toBeDefined();
+      expect(service._pharmacy.drugs.length).toEqual(2);
+      expect(service._pharmacy.drugs[0]).toEqual(mockDataItems[0]);
+      expect(service._pharmacy.drugs[1]).toEqual(mockDataItems[1]);
+    });
+  });
+
+  describe("#process", () => {
+    describe("When catching problem", () => {
+      it("should throw error", () => {
+        jest.spyOn(service, "pushLog");
+        jest.spyOn(service, "writeLog");
+        service.process();
+        expect(service.pushLog).toHaveBeenCalledTimes(30);
+        expect(service.writeLog).toHaveBeenCalledTimes(1);
+      });
+    });
+  });
+});
\ No newline at end of file
diff --git a/yarn.lock b/yarn.lock
index a191afad..bab6ae72 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -68,12 +68,12 @@
     "jsesc" "^2.5.1"
     "source-map" "^0.5.0"
 
-"@babel/helper-annotate-as-pure@^7.0.0":
-  "integrity" "sha512-3UYcJUj9kvSLbLbUIfQTqzcy5VX7GRZ/CCDrnOaZorFFM01aXp1+GJwuFGV4NDDoAS+mOUyHcO6UD/RfqOks3Q=="
-  "resolved" "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.0.0.tgz"
-  "version" "7.0.0"
+"@babel/helper-annotate-as-pure@^7.0.0", "@babel/helper-annotate-as-pure@^7.16.7":
+  "integrity" "sha512-s6t2w/IPQVTAET1HitoowRGXooX8mCgtuP5195wD/QJPV6wYjpujCGF7JuMODVX2ZAJOf1GT6DT9MHEZvLOFSw=="
+  "resolved" "https://registry.npmjs.org/@babel/helper-annotate-as-pure/-/helper-annotate-as-pure-7.16.7.tgz"
+  "version" "7.16.7"
   dependencies:
-    "@babel/types" "^7.0.0"
+    "@babel/types" "^7.16.7"
 
 "@babel/helper-builder-binary-assignment-operator-visitor@^7.1.0":
   "integrity" "sha512-qNSR4jrmJ8M1VMM9tibvyRAHXQs2PmaksQF7c1CGJNipfe3D8p+wgNwgso/P2A2r2mdgBWAXljNWR0QRZAMW8w=="
@@ -102,6 +102,19 @@
     "browserslist" "^4.17.5"
     "semver" "^6.3.0"
 
+"@babel/helper-create-class-features-plugin@^7.16.7":
+  "integrity" "sha512-kUjip3gruz6AJKOq5i3nC6CoCEEF/oHH3cp6tOZhB+IyyyPyW0g1Gfsxn3mkk6S08pIA2y8GQh609v9G/5sHVQ=="
+  "resolved" "https://registry.npmjs.org/@babel/helper-create-class-features-plugin/-/helper-create-class-features-plugin-7.17.9.tgz"
+  "version" "7.17.9"
+  dependencies:
+    "@babel/helper-annotate-as-pure" "^7.16.7"
+    "@babel/helper-environment-visitor" "^7.16.7"
+    "@babel/helper-function-name" "^7.17.9"
+    "@babel/helper-member-expression-to-functions" "^7.17.7"
+    "@babel/helper-optimise-call-expression" "^7.16.7"
+    "@babel/helper-replace-supers" "^7.16.7"
+    "@babel/helper-split-export-declaration" "^7.16.7"
+
 "@babel/helper-define-map@^7.5.5":
   "integrity" "sha512-fTfxx7i0B5NJqvUOBBGREnrqbTxRh7zinBANpZXAVDlsZxYdclDp467G1sQ8VZYMnAURY3RpBUAgOYT9GfzHBg=="
   "resolved" "https://registry.npmjs.org/@babel/helper-define-map/-/helper-define-map-7.5.5.tgz"
@@ -126,16 +139,15 @@
     "@babel/traverse" "^7.1.0"
     "@babel/types" "^7.0.0"
 
-"@babel/helper-function-name@^7.1.0", "@babel/helper-function-name@^7.16.7":
-  "integrity" "sha512-QfDfEnIUyyBSR3HtrtGECuZ6DAyCkYFp7GHl75vFtTnn6pjKeK0T1DB5lLkFvBea8MdaiUABx3osbgLyInoejA=="
-  "resolved" "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.16.7.tgz"
-  "version" "7.16.7"
+"@babel/helper-function-name@^7.1.0", "@babel/helper-function-name@^7.16.7", "@babel/helper-function-name@^7.17.9":
+  "integrity" "sha512-7cRisGlVtiVqZ0MW0/yFB4atgpGLWEHUVYnb448hZK4x+vih0YO5UoS11XIYtZYqHd0dIPMdUSv8q5K4LdMnIg=="
+  "resolved" "https://registry.npmjs.org/@babel/helper-function-name/-/helper-function-name-7.17.9.tgz"
+  "version" "7.17.9"
   dependencies:
-    "@babel/helper-get-function-arity" "^7.16.7"
     "@babel/template" "^7.16.7"
-    "@babel/types" "^7.16.7"
+    "@babel/types" "^7.17.0"
 
-"@babel/helper-get-function-arity@^7.0.0", "@babel/helper-get-function-arity@^7.16.7":
+"@babel/helper-get-function-arity@^7.0.0":
   "integrity" "sha512-flc+RLSOBXzNzVhcLu6ujeHUrD6tANAOU5ojrRx/as+tbzf8+stUCj7+IfRRoAbEZqj/ahXEMsjhOhgeZsrnTw=="
   "resolved" "https://registry.npmjs.org/@babel/helper-get-function-arity/-/helper-get-function-arity-7.16.7.tgz"
   "version" "7.16.7"
@@ -149,12 +161,12 @@
   dependencies:
     "@babel/types" "^7.16.7"
 
-"@babel/helper-member-expression-to-functions@^7.5.5":
-  "integrity" "sha512-5qZ3D1uMclSNqYcXqiHoA0meVdv+xUEex9em2fqMnrk/scphGlGgg66zjMrPJESPwrFJ6sbfFQYUSa0Mz7FabA=="
-  "resolved" "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.5.5.tgz"
-  "version" "7.5.5"
+"@babel/helper-member-expression-to-functions@^7.16.7", "@babel/helper-member-expression-to-functions@^7.17.7":
+  "integrity" "sha512-thxXgnQ8qQ11W2wVUObIqDL4p148VMxkt5T/qpN5k2fboRyzFGFmKsTGViquyM5QHKUy48OZoca8kw4ajaDPyw=="
+  "resolved" "https://registry.npmjs.org/@babel/helper-member-expression-to-functions/-/helper-member-expression-to-functions-7.17.7.tgz"
+  "version" "7.17.7"
   dependencies:
-    "@babel/types" "^7.5.5"
+    "@babel/types" "^7.17.0"
 
 "@babel/helper-module-imports@^7.0.0", "@babel/helper-module-imports@^7.16.7":
   "integrity" "sha512-LVtS6TqjJHFc+nYeITRo6VLXve70xmq7wPhWTqDJusJEgGmkAACWwMiTNrvfoQo6hEhFwAIixNkvB0jPXDL8Wg=="
@@ -177,14 +189,14 @@
     "@babel/traverse" "^7.16.7"
     "@babel/types" "^7.16.7"
 
-"@babel/helper-optimise-call-expression@^7.0.0":
-  "integrity" "sha512-u8nd9NQePYNQV8iPWu/pLLYBqZBa4ZaY1YWRFMuxrid94wKI1QNt67NEZ7GAe5Kc/0LLScbim05xZFWkAdrj9g=="
-  "resolved" "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.0.0.tgz"
-  "version" "7.0.0"
+"@babel/helper-optimise-call-expression@^7.0.0", "@babel/helper-optimise-call-expression@^7.16.7":
+  "integrity" "sha512-EtgBhg7rd/JcnpZFXpBy0ze1YRfdm7BnBX4uKMBd3ixa3RGAE002JZB66FJyNH7g0F38U05pXmA5P8cBh7z+1w=="
+  "resolved" "https://registry.npmjs.org/@babel/helper-optimise-call-expression/-/helper-optimise-call-expression-7.16.7.tgz"
+  "version" "7.16.7"
   dependencies:
-    "@babel/types" "^7.0.0"
+    "@babel/types" "^7.16.7"
 
-"@babel/helper-plugin-utils@^7.0.0", "@babel/helper-plugin-utils@^7.10.4", "@babel/helper-plugin-utils@^7.12.13", "@babel/helper-plugin-utils@^7.14.5", "@babel/helper-plugin-utils@^7.8.0":
+"@babel/helper-plugin-utils@^7.0.0", "@babel/helper-plugin-utils@^7.10.4", "@babel/helper-plugin-utils@^7.12.13", "@babel/helper-plugin-utils@^7.14.5", "@babel/helper-plugin-utils@^7.16.7", "@babel/helper-plugin-utils@^7.8.0":
   "integrity" "sha512-Qg3Nk7ZxpgMrsox6HreY1ZNKdBq7K72tDSliA6dCl5f007jR4ne8iD5UzuNnCJH2xBf2BEEVGr+/OL6Gdp7RxA=="
   "resolved" "https://registry.npmjs.org/@babel/helper-plugin-utils/-/helper-plugin-utils-7.16.7.tgz"
   "version" "7.16.7"
@@ -207,15 +219,16 @@
     "@babel/traverse" "^7.1.0"
     "@babel/types" "^7.0.0"
 
-"@babel/helper-replace-supers@^7.5.5":
-  "integrity" "sha512-XvRFWrNnlsow2u7jXDuH4jDDctkxbS7gXssrP4q2nUD606ukXHRvydj346wmNg+zAgpFx4MWf4+usfC93bElJg=="
-  "resolved" "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.5.5.tgz"
-  "version" "7.5.5"
+"@babel/helper-replace-supers@^7.16.7", "@babel/helper-replace-supers@^7.5.5":
+  "integrity" "sha512-y9vsWilTNaVnVh6xiJfABzsNpgDPKev9HnAgz6Gb1p6UUwf9NepdlsV7VXGCftJM+jqD5f7JIEubcpLjZj5dBw=="
+  "resolved" "https://registry.npmjs.org/@babel/helper-replace-supers/-/helper-replace-supers-7.16.7.tgz"
+  "version" "7.16.7"
   dependencies:
-    "@babel/helper-member-expression-to-functions" "^7.5.5"
-    "@babel/helper-optimise-call-expression" "^7.0.0"
-    "@babel/traverse" "^7.5.5"
-    "@babel/types" "^7.5.5"
+    "@babel/helper-environment-visitor" "^7.16.7"
+    "@babel/helper-member-expression-to-functions" "^7.16.7"
+    "@babel/helper-optimise-call-expression" "^7.16.7"
+    "@babel/traverse" "^7.16.7"
+    "@babel/types" "^7.16.7"
 
 "@babel/helper-simple-access@^7.1.0", "@babel/helper-simple-access@^7.16.7":
   "integrity" "sha512-ZIzHVyoeLMvXMN/vok/a4LWRy8G2v205mNP0XOuf9XRLyX5/u9CnVulUtDgUTama3lT+bf/UqucuZjqiGuTS1g=="
@@ -295,6 +308,14 @@
     "@babel/helper-remap-async-to-generator" "^7.1.0"
     "@babel/plugin-syntax-async-generators" "^7.2.0"
 
+"@babel/plugin-proposal-class-properties@^7.16.7":
+  "integrity" "sha512-IobU0Xme31ewjYOShSIqd/ZGM/r/cuOz2z0MDbNrhF5FW+ZVgi0f2lyeoj9KFPDOAqsYxmLWZte1WOwlvY9aww=="
+  "resolved" "https://registry.npmjs.org/@babel/plugin-proposal-class-properties/-/plugin-proposal-class-properties-7.16.7.tgz"
+  "version" "7.16.7"
+  dependencies:
+    "@babel/helper-create-class-features-plugin" "^7.16.7"
+    "@babel/helper-plugin-utils" "^7.16.7"
+
 "@babel/plugin-proposal-dynamic-import@^7.5.0":
   "integrity" "sha512-x/iMjggsKTFHYC6g11PL7Qy58IK8H5zqfm9e6hu4z1iH2IRyAp9u9dL80zA6R76yFovETFLKz2VJIC2iIPBuFw=="
   "resolved" "https://registry.npmjs.org/@babel/plugin-proposal-dynamic-import/-/plugin-proposal-dynamic-import-7.5.0.tgz"
@@ -758,7 +779,7 @@
     "@babel/parser" "^7.16.7"
     "@babel/types" "^7.16.7"
 
-"@babel/traverse@^7.0.0", "@babel/traverse@^7.1.0", "@babel/traverse@^7.16.7", "@babel/traverse@^7.17.0", "@babel/traverse@^7.17.3", "@babel/traverse@^7.4.3", "@babel/traverse@^7.4.4", "@babel/traverse@^7.5.5":
+"@babel/traverse@^7.0.0", "@babel/traverse@^7.1.0", "@babel/traverse@^7.16.7", "@babel/traverse@^7.17.0", "@babel/traverse@^7.17.3", "@babel/traverse@^7.4.3", "@babel/traverse@^7.4.4":
   "integrity" "sha512-5irClVky7TxRWIRtxlh2WPUUOLhcPN06AGgaQSB8AEwuyEBgJVuJ5imdHm5zxk8w0QS5T+tDfnDxAlhWjpb7cw=="
   "resolved" "https://registry.npmjs.org/@babel/traverse/-/traverse-7.17.3.tgz"
   "version" "7.17.3"