Forum Sponsor:

Free your teams from error-prone spreadsheets and disconnected systems, and move into an organized and robust software solution targeted at keeping projects on budget, on schedule and under tight control. Learn more here.

Tips on using this forum..

(1) Explain your problem, don't simply post "This isn't working". What were you doing when you faced the problem? What have you tried to resolve - did you look for a solution using "Search" ? Has it happened just once or several times?

(2) It's also good to get feedback when a solution is found, return to the original post to explain how it was resolved so that more people can also use the results.

Resilience an Important Schedule Quality Attribute

4 replies [Last post]
Colin Peters
User offline. Last seen 26 weeks 5 days ago. Offline
Joined: 8 Nov 2011
Posts: 40
Groups: None

Here we look at why resilience is a more important schedule quality than critical path optimization



I did not expect such statement from you.

Schedule optimization always leads to minimizing activity floats.

Crashing leads to parallel paths with minimal floats.

Best Regards,


Rafael Davila
User is online Online
Joined: 1 Mar 2004
Posts: 4832

To say resilience is a more important schedule quality than critical path optimization is in error.

  • You get a higher increase in probabilities of success by targeting critical path.
  • Critical path optimization is the most important factor to address, to say otherwise is misleading.
  • I do not mean to say to say near critical paths do not matter, merge bias do matter. The point is that critical path is still the most important path to increase probabilities of success.
  • It cost less to compress a single path than many.
  • 85% success probability is considered a pragmatic target.
  • Crashing might come at a very high cost, crashing of non critical paths makes not much sense. 

The following figure compares different strategies, in most cases if you want to increase the probabilities instead of compressing parallel paths it will be better to further compress the current critical path.


Mike Testro
User offline. Last seen 4 days 6 min ago. Offline
Joined: 14 Dec 2005
Posts: 4398

Hi Vladimir.

More than 1 critical path means that the logic has been rigged to create them.

Best regards

Mike T.

I wonder who may support an idea that longer schedule with one critical path is better than shorter schedule that has several critical or subcritical paths.