Duration - The Holy Grail of MS Project?

MS Project
How MS Project Deals With Duration

MS Project Perspective on Duration

Duration:
How long it will take to complete a task/activity and thereby contribute to building a deliverable
Given:
The productive work required and the units of production capacity available
Expressed as time (minutes; hours; days)

Productive Work:
How long it will take to complete a task/activity and thereby contribute to building a deliverable
Given:
The productive work required and the units of production capacity available
Expressed as time (minutes; hours; days)

Unit of Capacity Available for Work
The availability of productive capacity to conduct work
Given
The Calendar configuration in MS Project
Expressed as availability (100 = full availability)

16
8/.5
Duration = Work/Units
8
16 *.5
Work = duration *Units
.5
8/16
units = Work/duration

Duration = 8 hrs/ 1
Duration = 8 hrs/.5

Work = 8 *.5
Work = 16 *.5

Duration = 8/1
Duration = 16/1

Duration = 8/ 1
Duration = 8/.5

units = 8/8
units = 8/16

Duration = 8/1
Duration = 16/1

Work = 8 *1
Work = 8 *.5

Work = 8 *1
Work = 16 *1

units = 8/8
units = 16/8