This writing is attached with Logbook

(This writing is attached with Logbook) With the enormous improvements in the computers, software now pervades most facets of modern life. Software is now often the gating element in most branches of engineering and science. To formalize the developing of software and improving efficiency, the software engineering theory were rapidly developed in last decades years. Software process model is a framework, which defines a small number of activities applicable to all software projects, regardless of their size or complexity. This report describes one of software process model, Capability Maturity Model (CMM). CMM explains how to assess and improve software process maturity that based on 5-capability levels evolutionary path. It provides a framework for organizing these evolutionary steps into these maturity levels that lay successive foundations for continuous process improvement. These five maturity levels define an ordinal scale for measuring the maturity of an organization's software process and for evaluating its software process capability. The five levels in the improvement model for software are designed that the capabilities at the lower levels provide a progressively stronger foundation on which to build the upper levels. These five developmental stages are referred to as maturity levels, and at each level, the organization has a distinct process capability. By moving up these levels, the organization's capability is consistently improved. The maturity level is a well-defined evolutionary plateau toward achieving a mature software process. Each maturity level provides a layer in the foundation for continuous process improvement. Each level comprises a set of process goals that, when satisfied, stabilize an important component of the software process. Achieving each level of the maturity framework establishes a different component in the software process, resulting in an increase in the process capability of the organ...