{"id":344,"date":"2011-11-26T07:05:25","date_gmt":"2011-11-26T07:05:25","guid":{"rendered":"http:\/\/www.websitedesignwebsitedevelopment.com\/?p=344"},"modified":"2014-03-19T09:14:15","modified_gmt":"2014-03-19T09:14:15","slug":"open-sources-vs-custom-developed-modules","status":"publish","type":"post","link":"https:\/\/androidbubble.com\/blog\/website-development\/software-engineering-perspective\/open-sources-vs-custom-developed-modules\/","title":{"rendered":"Open-sources vs. Custom Developed Modules"},"content":{"rendered":"

Open-sources vs. Custom Developed Modules<\/h2>\n

Risk Exposure can be calculated as follows:<\/b>
\nRE = Probability of the risk x Cost<\/p>\n

<\/p>\n

Sometimes we can’t go for custom development for each module required in an application. And sometimes we can’t exactly use the open-sources.<\/p>\n

e.g.<\/p>\n

If you are going to implement a shopping cart, video portal or a picture cart so there are few open-sources are available:<\/p>\n

    \n
  1. Videos – http:\/\/www.phpmotion.com<\/li>\n
  2. Pictures – http:\/\/www.picturespro.com<\/li>\n
  3. Products – http:\/\/www.opencart.com<\/li>\n<\/ol>\n

    One must will go with 70% to 80% with developed modules of these projects but still 20% to 30% will require modifications. Which will involve following risks and their probabilities. <\/p>\n

    Risk:<\/b>
    \n\u2013 Only 70% of the software components scheduled for reuse will, in fact, be
    \nintegrated into the application. The remaining functionality will have to be
    \ncustom developed.<\/p>\n

      \n
    • \nRisk Probability \u2013 80% likely (i.e. 0.8)<\/li>\n
    • \nRisk impact<\/p>\n

      \u2013 60 reusable software components were planned. If only 70% can be used,
      \n18 components would have to be developed from scratch. Since the average component will cost 100,000, the total cost will be 1,800,000.<\/li>\n

    • \nTherefore, RE = 0.8 * 1,800,000 = 1,440,000<\/li>\n<\/ul>\n

      Management\/Contingency Plan Will be:<\/p>\n

        \n
      1. RE computed to 1,440,000. Allocate this amount within project contingency cost.<\/li>\n
      2. \nDevelop revised schedule assuming 18 additional components will have to be custom-built.<\/li>\n
      3. \nAllocate staff accordingly.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"

        Open-sources vs. Custom Developed Modules Risk Exposure can be calculated as follows: RE = Probability of the risk x Cost Sometimes we can’t go for custom development for each module required in an application. And sometimes we can’t exactly use the open-sources. e.g. If you are going to implement a shopping cart, video portal or […]<\/p>\n","protected":false},"author":1,"featured_media":346,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[32],"tags":[],"class_list":["post-344","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-software-engineering-perspective"],"acf":[],"yoast_head":"\nOpen-sources vs. Custom Developed Modules<\/title>\n<meta name=\"description\" content=\"Open-sources vs. Custom Developed Modules\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/androidbubble.com\/blog\/website-development\/software-engineering-perspective\/open-sources-vs-custom-developed-modules\/\" \/>\n<meta property=\"og:locale\" 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