{"id":7238,"date":"2022-05-12T14:59:11","date_gmt":"2022-05-12T09:29:11","guid":{"rendered":"https:\/\/www.innovationm.com\/blog\/?p=7238"},"modified":"2022-05-12T16:21:06","modified_gmt":"2022-05-12T10:51:06","slug":"sdlc-models","status":"publish","type":"post","link":"https:\/\/www.innovationm.com\/blog\/sdlc-models\/","title":{"rendered":"SDLC &#038; Models"},"content":{"rendered":"<p><strong>What is <\/strong><strong>Software Development Life Cycle<\/strong>\u00a0<strong>(SDLC)?<\/strong><\/p>\n<p>Step by step process of developing an application is known as SDLC. SDLC is a process used by the software industry to design, develop and test high-quality software.<\/p>\n<p><strong>Purpose of SDLC<\/strong><\/p>\n<p>It aims to produce quality software that meets customer expectations and reaches completion within time &amp; budget.<\/p>\n<p><strong>SDLC Phases<\/strong><\/p>\n<ul>\n<li>Requirement collection<\/li>\n<li>Feasibility study<\/li>\n<li>Design<\/li>\n<li>Coding<\/li>\n<li>Testing<\/li>\n<li>Installation<\/li>\n<li>Maintenance<\/li>\n<\/ul>\n<p><strong>Requirement collection<\/strong><\/p>\n<p>In this phase, we collect the business need of a customer in the form of a requirement document.<\/p>\n<p><strong>Feasibility study<\/strong><\/p>\n<p>Based on the customer requirement the team sits &amp; decides if the project is durable or not.<\/p>\n<p><strong>Design<\/strong><\/p>\n<p>It is like a blueprint of an application that represents the flow of the application, modules, and components.<\/p>\n<p><strong>Coding<\/strong><\/p>\n<p>Once the blueprint is ready then the developer starts writing the logic or the program to develop an application.<\/p>\n<p><strong>Testing<\/strong><\/p>\n<p>Once the application is handed over to the Test engineer, they started checking the functionality of an application as per the requirement document, it is known as the \u201ctesting process\u201d.<\/p>\n<p>During the testing process, We (T.E) may find some bugs or defects which is given to the developer, and they fix them, WE (T.E) retest it and close the bug if it is working.<\/p>\n<p>This process of testing the application goes on until the software becomes stable or bug-free.<\/p>\n<p><strong>Installation<\/strong><\/p>\n<p>After the application is Developed, Tested &amp; Stable then the application is handed over to the customer I.E installed &amp; deployed to the customer\u2019s place.<\/p>\n<p><strong>Maintenance<\/strong><\/p>\n<p>After the application release is completed the customer may face some issues that need to be fixed as soon as possible &amp; handed to the customer. This task is done under the maintenance phase.<\/p>\n<p><strong>Summery<\/strong><\/p>\n<p>(This is how we develop all the Software or application in the software industry.)<\/p>\n<p><strong>Models of SDLC<\/strong><\/p>\n<ul>\n<li>Waterfall model<\/li>\n<li>Spiral model<\/li>\n<li>Prototype model<\/li>\n<li>V-V model<\/li>\n<li>Hybrid model<\/li>\n<li>Agile methodology<\/li>\n<\/ul>\n<p><strong>Waterfall Model<\/strong><\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-7245\" src=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-1-120x300.png\" alt=\"\" width=\"166\" height=\"415\" srcset=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-1-120x300.png 120w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-1-410x1024.png 410w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-1-768x1920.png 768w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-1-614x1536.png 614w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-1-624x1560.png 624w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-1.png 800w\" sizes=\"(max-width: 166px) 100vw, 166px\" \/><\/p>\n<ol>\n<li>It is a basic model. (All other models derived from the Waterfall model<\/li>\n<li>The developer used to test the application<\/li>\n<li>No parallel deliverable (No two teamwork at a time)<\/li>\n<\/ol>\n<p><strong>Advantages of the Waterfall Model:<\/strong><\/p>\n<ul>\n<li>The waterfall model is a simple model which can be easily understood and is the one in which all the phases are done step by step.<\/li>\n<\/ul>\n<p><strong>Disadvantages of the Waterfall model:<\/strong><\/p>\n<ul>\n<li>The waterfall model is time-consuming.<\/li>\n<li>No Requirement change is allowed.<\/li>\n<\/ul>\n<p><strong>Note-<\/strong>: <strong>When do we go for the waterfall model?<\/strong><\/p>\n<p>Generally, we go for the waterfall model only in the case of life-critical (Health care applications), Machine critical (Military base software).<\/p>\n<p><strong>Spiral model<\/strong><\/p>\n<p><span style=\"font-size: 1rem;\">Developing an application module by module &amp; Delivering it to the customer is called the \u201cSpiral model.\u201d<\/span><\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-7242\" src=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b1-300x169.png\" alt=\"\" width=\"328\" height=\"185\" srcset=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b1-300x169.png 300w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b1-1024x576.png 1024w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b1-768x432.png 768w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b1-624x351.png 624w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b1.png 1366w\" sizes=\"(max-width: 328px) 100vw, 328px\" \/><\/p>\n<p><strong>Advantages<\/strong><\/p>\n<ul>\n<li>Flexible for changing the requirements<\/li>\n<li>Customers can use the application part in the early stage.<\/li>\n<li>The developer and Test engineer will have more knowledge of the application.<\/li>\n<\/ul>\n<p><strong>Disadvantages<\/strong><\/p>\n<ul>\n<li>No parallel deliverable (No two teamwork at a time)<\/li>\n<li>Requirement review doesn\u2019t exist<\/li>\n<\/ul>\n<p><strong>Prototype model<\/strong><\/p>\n<p><img decoding=\"async\" class=\"alignnone wp-image-7241\" src=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-120x300.png\" alt=\"\" width=\"164\" height=\"410\" srcset=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-120x300.png 120w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-410x1024.png 410w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-768x1920.png 768w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-614x1536.png 614w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection-624x1560.png 624w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/Requirement-Collection.png 800w\" sizes=\"(max-width: 164px) 100vw, 164px\" \/><\/p>\n<p>in the prototype model where we develop a prototype, test a prototype &amp; get the customer approval then we start our actual work like Design, coding, testing, installation &amp; Maintenance<\/p>\n<p>The actual software is built using the Waterfall model approach.<\/p>\n<p><strong>Advantages of the Prototype Model<\/strong><\/p>\n<ul>\n<li>Customer satisfaction possible<\/li>\n<li>Customer review is possible<\/li>\n<li>Customer rejection is less<\/li>\n<li>The prototype can use for similar application<\/li>\n<\/ul>\n<p><strong>Disadvantages of Prototype Model<\/strong><\/p>\n<ul>\n<li>No parallel deliverable<\/li>\n<li>Requirement review doesn\u2019t exist.<\/li>\n<li>Time-consuming (If the customer keeps rejecting the prototype)<\/li>\n<\/ul>\n<p><strong>V-Model<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7243\" src=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b3-300x160.jpg\" alt=\"\" width=\"341\" height=\"182\" srcset=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b3-300x160.jpg 300w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b3-624x332.jpg 624w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b3.jpg 646w\" sizes=\"(max-width: 341px) 100vw, 341px\" \/><\/p>\n<p>In this model first execution happens in the Downward direction and after a certain point, we have an upward direction to complete the project during this process it came into a V shape. Hence it is known as the V model.<\/p>\n<p><strong>Advantages of the V \u2013V Model<\/strong><\/p>\n<ul>\n<li>It is a simple and easily understandable model.<\/li>\n<li>Parallel deliverable.<\/li>\n<li>Test documents can be reused<\/li>\n<li>Test engineers have good product knowledge.<\/li>\n<li>Customers get Robust product<\/li>\n<\/ul>\n<p><strong>Disadvantages of the V-V Model<\/strong><\/p>\n<ul>\n<li>Time-consuming<\/li>\n<li>High-cost model<\/li>\n<\/ul>\n<p><strong>Note1-: V model is best suited for large &amp; complex applications.<\/strong><\/p>\n<p><strong>Hybrid-Model<\/strong><\/p>\n<p>A hybrid model means a combination of two or more models<\/p>\n<p>For example<\/p>\n<ul>\n<li>\u00a0Prototype+Spiral<\/li>\n<li>\u00a0V model + prototype<\/li>\n<\/ul>\n<p><strong>Note-Generally we go for the hybrid model whenever we want to get the characteristic of multiple models in a single model.<\/strong><\/p>\n<p><strong>Agile-Model<\/strong><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7244\" src=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b4-300x194.png\" alt=\"\" width=\"362\" height=\"234\" srcset=\"https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b4-300x194.png 300w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b4-624x404.png 624w, https:\/\/www.innovationm.com\/blog\/wp-content\/uploads\/2022\/05\/b4.png 645w\" sizes=\"(max-width: 362px) 100vw, 362px\" \/><\/p>\n<ul>\n<li>It is an iterative or incremental approach.<\/li>\n<li>It is a method to develop and delivered a high-quality product or software application in the fastest way according to customer requirements.<\/li>\n<\/ul>\n<p><strong>Advantages of Agile Model:<\/strong><\/p>\n<ul>\n<li>It allows more flexibility to adapt to the changes.<\/li>\n<li>The new feature can be added easily.<\/li>\n<li>Requirement change allowed.<\/li>\n<li>The release will be very fast<\/li>\n<li>Customers no need to wait a long time<\/li>\n<\/ul>\n<p><strong>Disadvantages:<\/strong><\/p>\n<p>Less focus on the documentation.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is Software Development Life Cycle\u00a0(SDLC)? Step by step process of developing an application is known as SDLC. SDLC is a process used by the software industry to design, develop and test high-quality software. Purpose of SDLC It aims to produce quality software that meets customer expectations and reaches completion within time &amp; budget. SDLC [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":7252,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[71],"tags":[],"class_list":["post-7238","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mobile"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>SDLC &amp; Models - InnovationM - Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.innovationm.com\/blog\/sdlc-models\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"SDLC &amp; Models - InnovationM - Blog\" \/>\n<meta property=\"og:description\" content=\"What is Software Development Life Cycle\u00a0(SDLC)? 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