Project Estimation In preparing for our website project, we have spoken to several other PMs in our organization as well as from our local PMI chapter, and some restaurant marketing industry experts. Through this investigation, we have gathered the following information: You have undertaken a similar project in the past, building a website with online ordering capabilities. That project took you 25 weeks. Your project sponsor has projected that your 8 phases of Project Quiz should take approximately 4 weeks per project phase to complete a project of this size and scope. From past project data from Target's retail store expansion to Canada, with a website with similar shopping cart and location functionality, they have shared that phase 1 took 3 weeks, phase 2 took 1 week, phase 3 took 5 weeks, phase 4 took 5 weeks, phase 5 took 2 weeks, phase 6 took 4 weeks, phase 7 took 3 weeks, and finally, the closing phase took a week. At a PMI networking event, you spoke to 3 experienced IT project managers about your project. Mireille estimated 28 weeks for the project, Pierre thought it would take 35, and Jadwiga was bullish with an estimate of 24 weeks. Data available on PMI.org and a textbook you have read on managing successful web development processes, it would appear that 8 working days PER website page or section is the recommended estimate for a website of this type. It is assumed that 40-hour work weeks will be utilized for estimation purposes.

I have already known

PERT is 28.5weeks

Triangular is 29weeks

Analogous 25weeks

Bottom-up 24weeks

Top-down 32weeks

What's the Parametric estimation (how many weeks)? The correct answer is 35.2 weeks, but how to calculate to get this answer?