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Total Float and Critical Path

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John Perez
User offline. Last seen 3 years 3 weeks ago. Offline
Joined: 28 Jul 2016
Posts: 2
Groups: None

I am reviewing a P6 scheule and noticed that I have several activities that are not on the critical path (red bars on the gnatt chart), but are calculating the same Total Float as activiites on the critical path. If the activities have the same Total Float does that make them all fall on the critical path? Can anyone shed a light on why this is occring?

Replies

Gary Whitehead
User offline. Last seen 11 weeks 3 days ago. Offline

John,

 

There's a few possibilities:

1) Hit F9>Options. If "Make Open ended activities critical" box is checked, activities with no predecesor will be coloured red even if they have float

2) From the same Options window, if "Define critical activities as" is set to "longest path", then only those activies on the longest path through the project will be shaded red, so if another activitiy not on the loogest path has zero or even negative float because of a finish no later than constraint for example, it will not be coloured red.

3) If instead "Define critical activities as" is set to, say, float less than or equal to 0 hours, and your total float column is displaying float in days, you could have activities with, say, 2 hrs float that are not shaded red, but are rounded down to 0 days float in the column. You can check this by going to Edit > User prefs > Time units, and making the duration foramt the same unit as you have used in the "Define critical activities as" option

4) Someone may have played around with the bar settings, so the standard "Critical remianing" bar (which is the one shaded red) isn't displaying properly becuase it is set to the wrong order of prsecedence, or the filter has been changed or something.

 

Cheers,

G