The majority of project planning effort today is still performed in a strictly “deterministic” manner. All project tasks and resources are assigned and executed within well defined timeframes. At the same time we all know that real life necessitates corrective actions:
* Resources are not always available
* Extra tasks pop up during the course of the projects
* What happens most frequently is the initial estimate of the time required to perform a certain task is no longer validIt’s easy to mentally grasp such uncertainties and have an accurate estimate when dealing with a few variables. With large scale projects however having multiple uncertainty factors of a different nature and character means such analysis can not be performed manually. It demands a very special effort for an accurate project assessment.
Read more at: Project Perfect