Microsoft project management software used to plan, manage, and communicate a project schedule and other information among workgroup members, project managers, and other stakeholders.
CRManagement,
Okay, which Resource Text field, there are 30 of them?
Assuming you are using Resource Text1 field for the resource's phone number, this formula in the Resource Text2 field will indicate if you entered 10 digits for the phone number. Note that is you include delimiters (e.g. dashes, slashes, etc.) in the entry, the test value needs to change accordingly.
Text2=IIf([Text1]="","no entry",IIf(len([Text1])<>10,"error","OK"))
In order to do a direct check of your entry as you type it in, an Event triggered VBA macro is required and that my friend is a couple orders of magnitude more complex (i.e. you don't want to mess with it).
John