Many businesses underestimate the cost and time required during the SDLC process by as much as 50-60%. What are some reasons this might occur? In what stages do you think the underestimates are most critical and significant? Explain.

Further, what are some ways to curb the cost and time factors involved in the SLDC? For instance, should system users perform the systems development tasks, or should these duties be handled by the IT professionals trained in these specific SLDC techniques? Explain.

Finally, based on your experience and knowledge, how does communication (written and oral) play a crucial role in the proper execution of the SDLC? Explain.