Original Planned Days is a recorded value by DMS when the schedule is run for the first time. If the Planned Days value is changed the Original Planned days will hold the original value. About

Planned Days:  Operation duration can be calculated using “Planned Days” instead of Planned Runtime fitting into resource availability. However, DMS will incorporate both values in scheduling the activity. For example, suppose you have an operation that requires 10 hours of work but has an elapsed time (duration) of 4 days. The operation Runtime value would be entered as 10 and the Planned Days would be entered as 4. The DMS scheduler then evenly divides the hours for each day (2.5 hours per day) or if the resource is constrained during some of the time, DMS will fit the hours where it can. This feature can also be used for selecting how many resources you want to put on an operation. For example, if you have 100 hours or resource capacity in a day and a 75 hour operation requiring 25 hours a day you can put in 75 hours of Runtime and 3 “Planned Days”.