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What is an Interview?25
Planning & Requirement AnalysisThis is the most important part of the SDLC.The system services, constrain and goals are established by consultation with system uses. Then they are defined in a manner which is understandable by both users and development staff. All the business requirements are gathered in this phase.Before a computerized system is created factors such as the requirements of the system tasks expected features that should be present and operational requirements should be studied in depth. I this study while there should be discussion with the various stakeholders there is the need to study various files, systems and processes.Requirements of the SystemThere should be a perfect detailed study of the requirements of the system before it is built. These can be categorized into two areas:Functional RequirementsNon-Functional Requirements26PlanningMaintenanceSDLCDesignDevelopmentImplementation
Functional RequirementsThese are the tasks expected to be performed using the system.Eg: Tasks we expect from the word processing systemInserting wordsFormatting a pageSpell checkingNon-Functional RequirementsAll the other requirements except the system requirements are considered as the non-functional requirements of a computerized system.Eg: EfficiencyReliabilityInterface Requirements of the system etc.After identifying all the requirements which are needed to build the system specifications of the expected computerized system these requirements should be documented. That document is called System Requirements Specifications.Several methods are used as necessary to collect data in analysing system.Record SearchingInterviewingQuestionnaireObservationSamplingSystem DesignThe main tasks of the system design can be considered as follows:Identifying the components of the softwareIdentifying the software architecture of the system27