very often there is a question: “When is Resource over allocated, and how MS PROJECT 2013is dealing with it?”
That is very easy to explain. First I will ad the three Tasks:
and my Resource will be John Wayne:
Of course that I will assign John Wayne to all three Tasks:
As you can see, John Wayne is over allocated in all three Tasks. Let’s see Resource Usage diagram:
Now, suppose that John Wayne is a Superman! He can work 24 hours at Monday, so you do not want him to be marked as over allocated. You can do it here:
and I will get:
WHY? The answer is easy! I told MS PROJECT 2013 that Over allocation is calculated on Week by Week Basic. What dose it mean? It means that MS PROJECT 2013 is making calculation: 5 days * 8 house per day = 40 hours. John Wayne is occupied on 3 Tasks (Monday) * 8 hours = 24 hours, and that is less than 40 hours.
I will add Task 4, and Task 5, and I will assign John Wayne on it, and I will get:
John Wayne is now occupied 40 hours!
Finally I will add Task 6 with 1 minute Duration, and I will assign John Wayne to it, and I will get:
Tralaaaaaaaa! John Wayne is Over allocated now because he is working 40 hours + 1 minute on six Tasks, and that is larger than 40 hours.
Finally, does it make a sense to put one Resource to work 40 hours + 1 minute on various Tasks at the same day? Of course not. So I will make predecessors for those Tasks:
John is still over allocated because in a week he is working more than 40 hours (even 1 minute more makes him over allocated)!
But what if John will work on Task 6 after Task 5?
He is not over allocated any more? WHY? Because Task 6 is scheduled on the next week!
You got the point, didn’t you!