Although the relevant planning processes have been recognised, research has not yet clearly identified which of these are more crucial. As a result, project managers and
planners are often short of time and are therefore unable to properly perform all planning processes. As a result, they may choose to perform the easiest planning processes, or those mandatory to the start of a project, rather than the ones that
contribute the most to the success of the project. Zwikael and Globerson (2006) identified the following six planning processes as the ones that highly contribute to project success: