The original version of this paper was published here in May 2009:
See S-curve/intro.htm

This 4th Edition was submitted for publication in January 2019.
It is copyright to © Midori Media.
Published here August 2019.

PART 1 | How is an S‑curve Generated? —
Schedule Integrity, Summary and Detail Tasks, Milestone Tasks | PART 3

How is an S-curve Generated? — Summary and Detail Tasks

It is common for both the Baseline and Production Schedules to contain a combination of Summary and Detail Tasks. It is important to note that only Detail Tasks should be considered when generating S‑curves. Summary Tasks must be ignored. For example, a Project has one Summary Task, four Details Tasks, and a total of 90 Man Hours. If the Summary Task is included in the Baseline S‑curve calculations, the total Man Hours are doubled, as the Summary Task contains the total Man Hours of the four Detail Tasks.

Compare Table 3, below which includes the Summary and Details Task in the Baseline S‑curve calculations with Tables 4 and 5 (which will appear in Part 3 of this paper), which only include the Detail Tasks.

Task Name

Baseline Start

Baseline Finish

Baseline Man Hours

Baseline Duration (1)

Baseline MH per Day (2)

Project Summary

01‑Feb‑2016

05‑Feb‑2016

90.0

5

18

Task No. 1

01-Feb-2016

02-Feb-2016

12.0

2

6

Task No. 2

02-Feb-2016

04-Feb-2016

24.0

3

8

Task No. 3

03-Feb-2016

04-Feb-2016

30.0

2

15

Task No. 4

04-Feb-2016

05-Feb-2016

24.0

2

12


Totals

 

 

180.0

 

 

Task / Date

01‑Feb‑2016

02‑Feb‑2016

03‑Feb‑2016

04‑Feb‑2016

05‑Feb‑2016

Project Summary

18.0

18.0

18.0

18.0

18.0

Task No. 1

6.0

6.0

--

--

--

Task No. 2

--

8.0

8.0

8.0

--

Task No. 3

--

--

15.0

15.0

--

Task No. 4

--

--

--

12.0

12.0


Totals per Day

24.0

32.0

41.0

53.0

30.0


YTD Totals

24.0

56.0

97.0

150.0

180.0

Table 3: Baseline S‑curve Calculations, Including Summary Task
Schedule Integrity  How is an S‑curve Generated — Schedule Integrity

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