ABSTRACT
The major difference in the estimation of software LTW with the type of systems we
have been discussing so far is in the estimation of its development cost. Software
development involves more than writing codes. It is a systematic process that analyzes the
requirements, prototypes and designs alternative approaches, then implements, tests, and
delivers an automated solution. Traditional software development is performed in stages,
from requirements gathering and analysis, through customer acceptance, and transition to
operations and maintenance. The overall process is defined as the software lifetime.
