The following specifications and limits are supported in Microsoft Project on Windows 95 or Windows NT, although actual limits and performance speed are greatly dependent on your computer’s configuration. Please note that Out of Memory errors may occur before you reach the listed limits.
| Attribute | Maximum |
|---|---|
| Tasks per project file | limited by available memory |
| Resources per project | limited by available memory |
| Resource units per assignment | 10,000 units or 1,000,000 percent |
| 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 | 1,000 |
| Open project files per consolidated project | 1,000 |
| Sharer files connected to a resource pool | 999 (i.e., maximum open project files minus 1 for the resource pool itself) |
| Open windows | 50 |
| Base calendars | unlimited |
| Calendar exceptions per calendar | 1,000 |
| 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 |
| Maximum cost value in a currency field | 999,999,999,999 |
| Maximum work value | 1,666,666,664 hours |
| Print scaling adjustment range percentage | 10 to 500 percent |
| 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 |