Specifications for Microsoft Project

The following specifications are supported when you run Microsoft Office Project 2007 or Microsoft Project 2010 on Microsoft Windows XP Service Pack 2, Windows Vista, or Windows 7, although actual limits and performance speed depend on your computer's configuration.

Note: Out-of-memory errors may occur before you reach the listed limits.

Attribute	Maximum
Resources per project	700,000
Resource units per assignment	60,000,000 units or 6,000,000,000%
Resource availability dates	100
Tasks per project	400,000
Task dependencies per project	No limit
Predecessors per task	50,000
Successors per task	50,000
Outline levels per project	65,535
Consolidated projects	998
Open project files per consolidated project	998
Sharer files connected to a single resource pool	997 (That is, the maximum number of open project files, minus 1 for the resource pool itself.)
Open windows	50
Base calendars	Tested to 30,000+
Calendar exceptions per calendar	Testing was able to add more than 15,000 exceptions to a base calendar.
Rate tables to support varying 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	1,666,666,666 hours
Assignment work values for work assignments	999,999,999 hours
Assignment work values for variable material assignments	999,999,999 units
Assignment work values for fixed material assignments	60,000,000 units
Custom cell formats	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
Discontinuous selections in a sheet view	10
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
Value in a number field	9,999,999,999,999.99