What are the Software Development Life Cycle (SDLC) phases? There are various software development approaches defined and designed which are used/employed during development process of software, these approaches are also referred as “Software Development Process Models” (e. Waterfall model, incremental model, V- model, iterative model, RAD model, Agile model, Spiral model, Prototype model etc.). Each process model follows a particular life cycle in order to ensure success in process of software development. Software life cycle models describe phases of the software cycle and the order in which those phases are executed. Each phase produces deliverables required by the next phase in the life cycle. Requirements are translated into design. Code is produced according to the design which is called development phase. After coding and development the testing verifies the deliverable of the implementation phase against requirements. The development of a software program goes through seven stages. It is helpful to remember the correct order of the software development process. Make up a. Every team progresses through five stages of team development. An understanding of these five stages enables a manager to reach a high performing team quickly. The testing team follows Software Testing Life Cycle (STLC) which is similar to the development cycle followed by the development team. There are following six phases in every Software development life cycle model: Requirement gathering and analysis. Design. Implementation or coding. Testing. Deployment. Maintenance. 1) Requirement gathering and analysis: Business requirements are gathered in this phase. This phase is the main focus of the project managers and stake holders. Meetings with managers, stake holders and users are held in order to determine the requirements like; Who is going to use the system? How will they use the system? What data should be input into the system? What data should be output by the system? These are general questions that get answered during a requirements gathering phase. After requirement gathering these requirements are analyzed for their validity and the possibility of incorporating the requirements in the system to be development is also studied. Disclaimer: If you were hoping to find tips on how to improve your software lifecycle, get outta here –this ain’t for you! But, if you were hoping to come to. Software development is the process of computer programming, documenting, testing, and bug fixing involved in creating and maintaining applications and frameworks. This talk covers different challenges and experiences that we go through during different stages when developing software, and try to make us think about our. A team goes through five stages of development with each stage posing a different challenge. The 5 Stages of Team Development: Why Might You Form Teams? Finally, a Requirement Specification document is created which serves the purpose of guideline for the next phase of the model. The testing team follows the Software Testing Life Cycle and starts the Test Planning phase after the requirements analysis is completed. Design: In this phase the system and software design is prepared from the requirement specifications which were studied in the first phase. System Design helps in specifying hardware and system requirements and also helps in defining overall system architecture. The system design specifications serve as input for the next phase of the model. In this phase the testers comes up with the Test strategy, where they mention what to test, how to test. Implementation / Coding: On receiving system design documents, the work is divided in modules/units and actual coding is started. Since, in this phase the code is produced so it is the main focus for the developer. This is the longest phase of the software development life cycle. Testing: After the code is developed it is tested against the requirements to make sure that the product is actually solving the needs addressed and gathered during the requirements phase. During this phase all types of functional testing like unit testing, integration testing, system testing, acceptance testing are done as well as non- functional testing are also done. Deployment: After successful testing the product is delivered / deployed to the customer for their use. As soon as the product is given to the customers they will first do the beta testing. If any changes are required or if any bugs are caught, then they will report it to the engineering team. Once those changes are made or the bugs are fixed then the final deployment will happen. Maintenance: Once when the customers starts using the developed system then the actual problems comes up and needs to be solved from time to time. This process where the care is taken for the developed product is known as maintenance. What is the Software Development Life Cycle (SDLC)? The Software Development Life Cycle is a process that ensures good software is built. Some more specific takes on SDLC include: Each phase in the life cycle has its own process and deliverables that feed into the next phase. There are typically 5 phases starting with the analysis and requirements gathering and ending with the implementation. Let’s look in greater detail at each phase: Requirements Gathering/Analysis. This phase is critical to the success of the project. Expectations (whether of a client or your team) need to be fleshed out in great detail and documented. This is an iterative process with much communication taking place between stakeholders, end users and the project team. The following techniques can be used to gather requirements: Identify and capture stakeholder requirements using customer interviews and surveys. Build multiple use cases to describe each action that a user will take in the new system. Prototypes can be built to show the client what the end product will look like. Tools like Omnigraffle, Hot. Gloo and Balsalmiq are great for this part of the process. In a corporate setting, this means taking a look at your customers, figuring out what they want, and then designing what a successful outcome would look like in a new bit of software. Design Technical design requirements are prepared in this phase by lead development staff that can include architects and lead developers. The Business Requirements are used to define how the application will be written. Technical requirements will detail database tables to be added, new transactions to be defined, security processes and hardware and system requirements. Let’s look in more detail at some of the activities involved in this stage: Risk analysis Threats and vulnerabilities which may arise from interactions with other systems. External or legacy code needs to be analyzed to determine if there are security vulnerabilities. High- risk privacy projects could require review with a legal department. This review should consider what personal data to collect, how to collect it, and permissions/authorizations to make changes. This type of review is especially necessary with corporate projects. Functional Specifications Includes a description of interface requirements such as definition of data entry fields (allow numeric or alpha only, can it be left blank?)Important details, like: can date entered be before current date? What timezone will user logins default to? Workflow – after clicking approve button, which screen appears next? Audit trail for every update on the database. This is where error monitoring and logging tools can be useful. Non- Functional Specifications. Extensibility of the system – will current system easily allow new enhancements or features with the next rollout? This is critical for any application that you’ll be adding new features and updating often. Has the current or future capacity been analyzed for database requirements? Will the current build plan result in capacity issues shortly after you finish building? Performance and response time – Has the expected response time been determined? Resource Constraints – Are there constraints that need to be taken into consideration in this phase? Common ones include disk space, bandwidth, etc. Coding This phase is the actual coding and unit testing of the process by the development team. After each stage, the developer may demonstrate the work accomplished to the Business Analysts and tweaks and enhancements may be required. It’s important in this phase for developers to be open- minded and flexible if any changes are introduced. This is normally the longest phase of the SDLC. The finished product here is input to the Testing phase. Testing. Once the application is migrated to a test environment, different types of testing will be performed including integration and system testing. User acceptance testing is the last part of testing and is performed by the end users to ensure the system meets their expectations. At this point, defects may be found and more work may be required in the analysis, design or coding. Once sign- off is obtained by all relevant parties, implementation and deployment can begin. Implementation/Deployment. The size of the project will determine the complexity of the deployment. Training may be required for end users, operations and on- call IT staff. Roll- out of the system may be performed in stages starting with one branch then slowly adding all locations or it could be a full blown implementation. One of two methods can be followed in a SDLC process. Waterfall is the more traditional model and has a well structured plan and requirements to be followed. This method works well for large projects that may take many months to develop. The Agile Methodology is more flexible in the requirements, design and coding process and is very iterative. This process works best for smaller projects and expectations of continuous improvement to the application. Whether you use one over the other will also depend to a large extent on the corporation and skills of the IT dept. The best of the bug capturing tools. Continues improvement and fixing of the software is essential, Airbrake provides robust bug capturing in your application. In doing so, it notifies you with bugs instantly, allows you to easily review them, tie the bug to an individual piece of code, and trace the cause back to recent changes. Airbrake enables for easy categorization, searching, and prioritization of errors so that when bugs occur, your team can quickly determine the root cause. The amount of development time and effort saved by capturing your bugs with Airbrake is invaluable. Capture and Track Your Application’s Exceptions in 3 Minutes.
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