assignable variance

Im having doubts on a couple of questions:


1. An example of assignable variance in quality control:


a. equipment problem


b. Person responsible


c. Identifiable problem


d. Inadequate resource


2. changes are made to cost baseline when :


a. There is variance between what is budgeted and what is spent


b. In response to approved changes


3. CPM ( overestimates,underestimates).project duration and PERT (overestimates,underestimates) project duration.


Please help on these questions with explanations.


  • Answer to 1:    'C' Identifiable problem

  • Answer to 2:    'B' In response to approved changes


  • Answer to 3:  CPM and PERT maybe same but PERT is applied when weightage is consideration...


Maybe 'admin' and others can help better in this.