bsp; (71) ,had studied the waterfall model of software development as the primary software life-
cycle (72) .He was all set to use it for an upcoming project, his first assignment. However, Ravi foun
d that the waterfall model could not be used because the customer wanted the software delivered in stages, something that implied that the system had to be delivered and built in (73) and not as (74)  
development process, even after tailoring, generally cannot handle change requests. To accommodate change requests without losing control of the project, you must supplement the development process with a requirement change management proc