Project planning teams use project life cycle models because various types of projects have differing demands. Which of the following sequences of stages is most appropriate for a life cycle model for research and development (R & D) projects? a. project envisioning - requirements gathering - incremental implementation - production release b. define - measure - analyze - improve - control c. idea generation - idea screening - concept development - validation - transition d. pre-planning - design - procurement - construction - start up

becouse project life cycle have for types or stage that mostly do 1) conceptual/ definitely stage is specification of project at defined : means objective of project are established

2) palming satege : is the level of effort plans are determined what the project will be entail

3) excision stage : is major portion of the project work take place with physically and mentally

4) termination/closed stage: closed stage three consists are A-delivering the project of the product costomer ,B- replying project resource C- post project review.