PERT(Program or Project Management and Review Technique) and Critical Path Method(CPM) are two planning and scheduling managerial tools widely used in other industries. 

PERT is a tool used to estimate the time required to complete a task, mostly used in large projects. CPM is used when task/activity times are well known mostly in repetitive scheduling. 

I was wondering if anybody with experience in the Medical Device industry could provide some details regarding whether these are used by them, and if so where particularly they are applied. Are you using any particular software?