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Opened 6 years ago

Last modified 5 years ago

#9705 new defect

In ALAP scheduling, today is not a valid end date if no dates are assigned

Reported by: Chris Nelson Owned by: Chris Nelson
Priority: normal Component: TracJsGanttPlugin
Severity: normal Keywords:
Cc: falkb Trac Release: 0.11

Description

Any unspecified date defaults to today but if no dates are specified, an ALAP schedule works backwards from the end, gives the last task today as a due date then works into the past. But we can't work in the past so that's not a great choice.

Unfortunately, we don't know the makespan of the project before starting so we can't easily say "today plus makespan" as the starting point.

This should be fixed, even though I don't know how right now.

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Change History (3)

comment:1 Changed 6 years ago by falkb

Cc: falkb added; anonymous removed

comment:2 in reply to:  description ; Changed 5 years ago by falkb

Replying to ChrisNelson:

Any unspecified date defaults to today but if no dates are specified, an ALAP schedule works backwards from the end, gives the last task today as a due date then works into the past. But we can't work in the past so that's not a great choice.

Any news from this front? At present the chart is quite unusable for ALAP because of that computed start date in the past.

Unfortunately, we don't know the makespan of the project before starting so we can't easily say "today plus makespan" as the starting point.

This should be fixed, even though I don't know how right now.

Well, a known starting point can be the milestone if a date is set for it. And it is set here. So from the milestone date it could traverse backwards through the tickets depencency chain. Setting this start date, it looks like a small change.

comment:3 in reply to:  2 Changed 5 years ago by falkb

Replying to falkb:

Well, a known starting point can be the milestone if a date is set for it. And it is set here. So from the milestone date it could traverse backwards through the tickets depencency chain. Setting this start date, it looks like a small change.

I solved this special case with the patch applied to #10127.

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