Comparison of different life-cycle models | software engineering

Comparison of different life-cycle models

The classical waterfall model can be considered as the basic model and all other life cycle models as embellishments of this model. However, the classical waterfall model can not be used in practical development projects

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Posted in Comparison, Comparison of different life-cycle models, Life cycle model, notes of software engineering, Types of software life cycle models

Spiral model |life cycle model|software engineering

Spiral model

The Spiral model of software development is shown in fig. 2.2. The diagrammatic representation of this model appears like a spiral with many loops. The exact number of loops in the spiral is not fixed. Each loop of the spiral represents a phase of the software process. For example, the innermost loop might be concerned with feasibility study. The next loop with

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Posted in Basics of Software Life Cycle, engineering software, notes of software engineering, ƒSpiral Model, Types of software life cycle models

Prototype Life Cycle Model | software engineering

Prototype 

A prototype is a toy implementation of the system. A prototype usually exhibits limited functional capabilities, low reliability, and inefficient performance compared to the actual software. A prototype is usually built using several shortcuts. The shortcuts might involve using inefficient, inaccurate,

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Posted in notes of software engineering, ƒPrototyping Model, software engineers, Types of software life cycle models

Phase-entry and phase-exit criteria of each phase |life cycle model | software engineering

Phase-entry and phase-exit criteria of each phase

At the starting of the feasibility study, project managers or team leaders try to understand what is the actual problem by visiting the client side. At the end of that phase they pick the best solution and determine whether the solution is feasible financially and technically.

At the starting of requirements analysis and specification phase the required data is collected. After that requirement specification is carried out. Finally,

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Posted in Feasibility Study, Life cycle Phase-entry, notes of software engineering, phase-exit criteria, software engineer, Types of software life cycle models

Phase of waerfall model |waterfall model |software engineering

 phase of the life cycle of waterfall model

 feasibility study: -  

The main aim of feasibility study is to determine whether it would be financially and technically feasible to develop the product.

ƒ     At first project managers or team leaders try to have a rough understanding of what is required to be done by visiting the client side. They study different input data to the system and output data to be produced by the system.

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Posted in Basics of Software Life Cycle, ƒClassical Waterfall Model, ƒIterative Waterfall Model, notes of software engineering, software engineers, Types of software life cycle models

Types of software life cycle models | software engineering

Different software life cycle models

Many life cycle models have been proposed so far. Each of them has some advantages as well as some disadvantages. A few important and commonly used life cycle models are as follows:

• ƒClassical Waterfall Model
• ƒIterative Waterfall Model

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Posted in ƒClassical Waterfall Model, ƒEvolutionary Model, ƒIterative Waterfall Model, notes of software engineering, ƒPrototyping Model, software engineer, ƒSpiral Model, Types of software life cycle models