I have a question regarding EVM. Suppose I have a task with a 2 weeks duration. PV for week 1 is 800 and PV for week 2 is 200. If the PV is not proportional with the % complete, so each week I expect 50% of the task done, and suppose after the first week the % complete done was 60% of the total task. In this scenario if i use EV as (real % complete * BAC) I would get 600 (60%*1000) and this would mean that I am behind schedule due the 800 PV for week 1, but actually I am ahead of schedule. Ins this case would be better to compute EV as: If 60% is done then my EV is at least 800 because I did what was planned for week 1, plus i did a 10% of the remaining 50%, so i will have 20% of the 200 PV of week 2, obtaining an EV of 800 + (10%/50%)*200 =840, so now my EV would be bigger than PV for week 1 and I could see clearly than I am ahead of schedule.
Based on that, Am I thinking this right or the proportional thing is something we always have to assume.
Hope I made myself clear.
Thanks in advance.