Software maintenance is the process of modifying a software system or component after delivery to correct faults, improve performances or other attributes, or adapt to a changed environment.
An entrepreneur is one who always searches for change, responds to it and exploits it as an opportunity. Innovation is the basic tool of entrepreneurs, the means by which they exploit change as an opportunity for different business of service.
Entrepreneurship is the process of designing, launching and running a new business, which is often initially a small business along with any of its risk in order to make a profit. The people who create these businesses are called entrepreneurs.
A good software design implies clean decomposition of the problem into modules and the neat arrangement of these modules in a hierarchy. The primary characteristics of neat module decomposition are low coupling and high cohesion. Cohesion is a measure of functional strength of a module.
Software design deals with transforming the client requirements, as described in the SRS document, into a form (set of documents) that is suitable for implementation in a programming language.
At a technical level, software engineering begins with a series of modeling tasks that lead to a complete specification of requirements and a comprehensive design representation for the software to be built. The first technical representation of a system which is the analysis model, actually a set of models. There have been many methods proposed for analysis modeling.
A software requirement specification (SRS) is a comprehensive information/description of a product/system to be developed with its functional and non-functional requirements. The software requirement specification (SRS) is developed based on the agreement between customer and supplier.
The requirements elicitation and specification phase starts when the feasibility study phase is completed and the project is found to be technically and feasible. The goal of the requirements analysis and specification phase is to understand client requirements and to systematically organize these requirements in a specification document.
Evolutionary model is also referred to as the successive versions model and sometimes as the incremental model. In Evolutionary model, the software requirement is first broken down into several modules (or functional units) that can be incrementally constructed and delivered.
The spiral model is a software process model that couples the iterative nature of prototyping with the controlled and systematic aspects of the linear sequential model. Barry Boehm mentioned the Spiral model in this paper (1986).