as you may already know, you can put Resources in MS PROJECT in many different ways. Sometimes this is good, but sometimes it can be very annoying. I will show you one example with MS PROJECT 2016!
First I’m going to create new Project:
and some Resources:
Now I will assign some of them to the Task 1 through Gantt chart View:
and I will get:
Now let’s say that I want to assign Johnny Cash to Task 2, but I accidentally type Jonhhy and hit the Enter key:
As you can see MS PROJECT let me do that, and if I now look at the Resource Usage View I will find new Resource in it, even if I didn’t want it because this was obviously a mistake:
So, to correct this error I should erase Jonhhy form this sheet. If I do not want MS PROJECT let me to enter Resource which is not already in Resource sheet, like in example above, I should disable it like this:
Now, for example if I want to add Mary to Task 3, I will get:
when I hit Enter key:
Now I can choose if I want or not add Mary to my Resources, because she doesn’t exist in Resource Pool.
also be aware that this will apply only for the current Project on which I’m working at. If I want this option to be applied on al new Project I should choose:
Hope this helps.