Cocomo Model In Software Engineering Tutorial Point

#Cocomo Model In Software Engineering Tutorial Point Driver Ratings Can

COCOMO predicts the efforts and schedule of software product based on size of software. This model is developed in 1981 by Barry Boehm to give estimation of number of man-months it will take to develop a software product. Constructive Cost Model (COCOMO) COCOMO is one of the most widely used software estimation models in the world.

Cocomo Model In Software Engineering Tutorial Point Driver Ratings Can

The size and cost driver ratings can be different for each module, with the exception of the Required Development Schedule (SCED) cost driver and the scale factors.Conclusions.5. The COCOMO II model can be used to estimate effort and schedule for the whole project or for a project that consists of multiple modules. On the basis of project motive, the software development process model is selected for development.for use in the model.

This model is needs a little planning and does not follow formal development. It is specially useful in academic projects. Generally this model is used for small projects in which the development teams are small. Big-Bang is the SDLC(Software Development Life cycle) model in which no particular process is followed. CORADMO: Rapid.Following are the different software development process models: COPSEMO: Phase Schedule and Effort Estimation.

Code and fix model is one step ahead from the Big-Bang model. Big-Bang is poor model for lengthy and in-progress projects. This model is not suitable for object oriented and complex projects. It is useful for students and new comers. It needs just a few resources to be developed. The output of this model is developed software, that may or may not be according to the requirements of the customer.

The waterfall model is also called as 'Linear sequential model' or 'Classic life cycle model'. It is widely used in government projects and many vital projects in company. The waterfall model is the classic model or oldest model and is known as mother of all the model. It is not clear what will be delivered and when.

The algorithm is the step-by-step solution of the problem and the flow chart shows a complete flow diagram of a program. Modeling consists of complete requirement analysis and the design of the project i.e algorithm, flowchart etc. Testing part starts only after the development is completed.Following are the phases in waterfall model:The software development starts with the communication between customer and developer.It consists of complete estimation, scheduling for project development. In this model, feedback is taken after each phase to ensure that the project is on the right path. Hence the phases do not overlap in waterfall model.

If the customer wants some corrections or demands for the additional capabilities, then the change is required for improvement in the quality of the software. Deployment step consists of delivering the product to the customer and taking feedback from them. Testing also checks that the program provides desired output. Testing is to check whether the flow of coding is correct or not. Coding part implements the design details using an appropriate programming language.

This model is not good for complex and object oriented projects. This model is preferred for those projects where the quality is more important as compared to the cost of the project. This model works for small projects where the requirements are easily understood. It avoids overlapping of phases because each phase is completed at once. All the requirements are known at the beginning of the project, hence it is easy to manage.

This model is an extension of the waterfall model. V model is known as Verification and Validation model. The problems with this model are uncovered, until the software testing. It is a poor model for long duration projects.

In this phase, we study how the requirements are implemented their technical use. In system design, high level design of the software is constructed. The acceptance test design planning is completed at requirement stage because, business requirements are used as an input for acceptance testing. The requirements of product are understood from the customers point of view to know their exact requirement and expectation. Every phase completes its execution before the execution of next phase begins.

They help to remove the maximum faults and errors at an early stage. Unit tests are the vital part of any development process. Unit tests are designed in module design phase based on the internal module designs. Finalize all the methods, classes, interfaces, data types etc. In module phase, we separately design every module or the software components. The module relationship and dependencies of module, architectural diagrams, database tables, technology details are completed in this phase.

Many testing activities i.e planning, test design are executed in the starting, it saves more time. The coding is executed on the basis of coding guidelines and standards. On the basis of system and architecture requirements, we decide the best suitable programming language.

Each increment builds the product and submits it to the customer for suggesting any modifications. The first increment in this model is generally a core product. The incremental model combines the elements of waterfall model and they are applied in an iterative fashion. If the requirements are not constant then this model is not acceptable.Difference between the Verification and ValidationVerification is the process to find whether the software meets the specified requirements for particular phase.The validation process checks whether the software meets requirements and expectations of the customer.The objective of verification is to check whether software is constructed according to requirement and design specification.The objective of validation is to check whether the specifications are correct and satisfy the business need.It describes whether the outputs are as per the inputs or not.It explains whether outputs are accepted by the user or not.Verification is completed before the validation.Plans, requirement, specification, code are evaluated in the verifications.Actual product or software is tested under validation. V-model is not suitable for large and composite projects. This model is suitable for small projects where the requirements are easily understood.

This model is flexible because the cost of development is low and initial product delivery is faster. The algorithm is a step-by-step solution of the problem and the flow chart shows a complete flow diagram of a program. Modeling consists of complete requirement analysis and the design of the project like algorithm, flowchart etc. This process is repeated until the product is completed.For example, the word-processing software is developed using the incremental model.Following are the phases of Incremental model:

The cost of the final product may cross the cost initially estimated. The customers can respond to its functionalities after every increment. The working software is generated quickly in the software life cycle.