(This was nicely formatted when posted; your news reader may force you to
adjust the appearance so that the 2-column chart is easily understood.)
According to Microsoft.:
Tasks per project file 1 million
Resources per project 1 million
Resource units per assignment 60,000,000 units or 6,000,000,000%
Resource availability dates 100
Task dependencies per project file no limit
Predecessors per task no limit
Successors per task no limit
Outline levels per project 65,535
Consolidated projects 998
Open project files per consolidated project 998
Sharer files connected to a resource pool 999 (that is, maximum open
project files minus 1 for the resource pool itself)
Open windows 50
Base calendars unlimited
Calendar exceptions per calendar 1,400
Printable tasks in monthly calendar 4,000
Rate tables to support different pay scales and rates 5 per resource
Variable rates per rate table to support rate increases and decreases
25
Cost value in a currency field 999,999,999,999.99
Work value 1,666,666,667 hours
Assignment work values for:
a.. Work assignments
999,999,999 minutes
a.. Variable material assignments
999,999,999 units
a.. Fixed material assignments
60,000,000 units
Cells and Gantt bars that can be directly formatted 64,000
Print scaling adjustment range percentage 10-500%
Page header text 5 lines
Page footer text 3 lines
Page legend text 3 lines
Page legend text box width 5 inches (12.7 centimeters)
Filter tests per filter 40
Filter tests per AutoFilter 2 per column
Earliest date allowed for calculation January 1, 1984
Latest date allowed for calculation December 31, 2049
Discontiguous selections on a sheet view 9
Baselines 11
Characters in a text field 255
Characters in an outline code field 255
Values and characters in an Enterprise Resource Multi-Value (ERMV)
field 255 values, each of 255 characters
Digits in a number field 999,999,999,999.99