2. Timeliness: whether work was delivered on time as per stakeholder expectations and schedule.

Strategic: whether business objectives were met.

Significance: whether the investments expended to produce the work products were justified for the value they delivered.

Effectiveness: whether the business analyst work products were easy to use and understand.

5. PERT = (Optimistic + pessimistic + (4 times most likely)) / 6.

stakeholder engagement approach would be the output of this analysis after you've completed a thorough stakeholder analysis

The formula for PERT:(Optimistic+Pessimistic+(4 times most likely))/6

Root cause analysis is the method to help identifying the underlying cause of variances