Hi,

let’s go. First we will do a Setup!

I will add two Tasks to my Project:

I will make Paint the wall effort driven:

Now I will add two Resource to the Project: John and Mary!

I will assign John to the Read the article Task and Mary to the Paint the wall Task.

Finally I will set the Views. First Task Usage:

and now:

When you click on the lower part of the screen (in the Task Form) you should go to the Format Tab and do:

Everything is ready!

I will click on the Read the Article Task and I will get:

As you can this Task has: Duration = 2 days, it is non effort driven, fixed units it has 100% units, and Work = 16 hours. Work = Duration * Units –> Work = 2 days (8 hours per day) * 100% = 16 hours * 100% = 16 hours.

I will change Units from 100% to 150%:

and I will get:

Work is same = 16 hours! Because John can work with 150% capacity, he will work 8 * 150% = 12 hours at first day, and remaining 4 hours at second day, to fulfill 16 hours! But why is Duration=1,33 days? It seem it should be 1,5 day (because John will work only 4 hours at second day, instead of 8)! Well here is the explanation! Because I put 150% in Unit, MS PROJECT assumes that John has to work 12 hours / day (150% * 8 hours= 12 hours). And the Duration is calculated: 12 hours on first day = 1 day! 4 hours on second day (4/12)= 0,33, and total is = 1 + 0,33 = 1,33

OK. Now I will go back to initially Setup:

and I will change Work to 32 hours, click on OK button, and I will get:

Work is 32 hours! Because Task is Fixed Units, John will work with 100% capacity. The Magic Formula is Work = Duration * Units, and that means 32 = Duration * 100%. Because 1 day has 8 working hours It will be 32/8 = 4 days in the Duration field.

Finally I will (from initial setup) change the Duration from 2 to 3 days, click on the OK button, and I will get:

Duration is 3 days! Because Task is Fixed Units, John will work with 100% capacity. The Magic Formula is Work = Duration * Units, and that means Work = 3 days (8 hours per day) * 100%. = 24 hours.

In my next post I will continue with Fixed work and Fixed duration Task types.

Until then,

Best Regards!