The software development process, often known as the life cycle, is a framework used in the creation of a software product. There are various models for such processes (for example, the agile method), each of which describes methods for a range of tasks or activities that occur within the process.  Analyze the requirements. The first step in designing a desired software product is to extract its requirements. While consumers may assume they understand what the product is supposed to perform, recognizing incomplete, confusing, or conflicting requirements may need ability and experience in software engineering.  Specification. Specification is the effort of carefully and rigorously specifying the program to be produced.   In practice, most effective specifications are produced to comprehend and fine-tune existing well-developed applications, however safety-critical software systems are frequently well described prior to application development. Specifications are especially critical for external interfaces that must stay stable.   Architecture of software A software system's architecture refers to an abstract representation of that system. Architecture is concerned with ensuring that the software system will fulfill the product's needs as well as addressing future requirements.