For Example, In planning phase the conceptual model helps in identifying the requirements for the project such as human resource required for the project, calculating the time required to complete the project with the available resources and the software’s required for the project. In analysis phase the conceptual model determines the entities and attributes for the database and identifies the relation between them such as a Database entity like employees, customers and
orders and the relationship like one-one, one-many, many-one and many-many through their attributes like empID, empName, custID, CustName, OrdID,OrdNo. In Design phase the logical model we develop the views such as orders list which might not be a table present in database and it is only for the purpose of the customer to view it. In physical model we develop the schema for the project such as Employ schema that contains all the tables with attributes and their relationships . Let us consider Spiral model as SDLC methodology the spiral model has been developed to encompass the best features of both classic life cycle and prototyping. The goal of the Spiral model is to provide a framework for designing such processes, guided by risk levels in the project at hand. The main characteristics of spiral model are that is cyclic and not linear. Each
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- Spring '16
- Systems Development Life Cycle, Software development process, development life cycle