## Estimation in hours and Resource Assignments with Fixed work Tasks in MS Project 2019

Hi,

very often Tasks are estimated by effort, not duration. And Tasks are fixed work type. Now the question is: “How many hours will each resource spend at the Task?”

I will show that in MS PROJECT 2019.¸

Let’s say that I have a Project with one Task which need effort 24 hour (I will show that in Task Usage View): and that we have four Resources: John is available 100%, Mary 50%, Peter 75%, and Paula 20% to work per day. So John can work max. 8 hours per day, Mary 4 hours, Peter 6 hours, and Paula 2 hours.

Now I will assign them to the Task: So, Duration is 3 days, and each Resource will work 6 hours in Total. Let me explain the calculation:

• Since total work is 24 hours, and we have four Resources, each Resource will have to work 24 hours / 4 Resources = 6 hours
• John is 100% assigned. So according to formula Work = Duration * Units he will work 6 hours at first day, and he is done
• Mary is 50% assigned. So according to formula Work = Duration * Units she will work 4 hours at first day, and remining 2 hours at second day
• Peter is 75% assigned. So according to formula Work = Duration * Units he will work 6 hours at first day, and he is done
• Paula is 25% assigned. So according to formula Work = Duration * Units she will work 2 hours at first day, 2 hours at second day, and remining 2 hours at third day.

No, suppose that only John and Paula will work on Task: So, Duration is 6 days, and each Resource will work 12 hours in Total. Let me explain the calculation:

• Since total work is 24 hours, and we have two Resources, each Resource will have to work 24 hours / 2 Resources = 12 hours
• John is 100% assigned. So according to formula Work = Duration * Units he will work 8 hours at first day, and remaining 4 hours at second day
• Paula is 25% assigned. So according to formula Work = Duration * Units she will work 2 hours each day, and it will take her 6 days to fulfill those 12 hours.

This might seem complicated, but once you got it, you will see it is not!

Hope this helps.

Regards 