Guild of Project Controls: Compendium | Roles | Assessment | Certifications | Membership

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.

Madatory Constraint

3 replies [Last post]
Fri, 2007-06-29 08:05
ulysses garcia
User offline. Last seen 13 years 25 weeks ago. Offline
Joined: 22 Aug 2005
Posts: 259
Groups: GPC Qatar
HI,

Some of the planners say that a mandatory constraint shall be imposed at the end of project activity and others say not.
If ill be the one to ask , it should be..

What is your say..
Top

Replies

Sun, 2007-07-01 00:38
#1
A D
User offline. Last seen 3 years 36 weeks ago. Offline
Joined: 20 May 2007
Posts: 1027
Groups: Accreditation Editors
Hi gracia,

Mandatory Start and Finish constraints completely override network logic and do not allow for float calculations. Suggest that your contractor should have used START ON or START NO EARLIER THAN or START NO LATER THEN constraints.

NOTE: Mandatory Start and Finish constraints do not obey CPM rules. The activity configured in this manner will be scheduled to start on the date given even if all predecessors are not complete. START ON constraints work the same as a MANDATORY START but also obey CPM logic rules.

START NO EARLIER THAN allows for float calculation in delay direction and START NO LATER THAN allows for float calculation in the accelerate direction.

So, yes of course, program submitted is technically and legally correct.

Cheers,

Raviraj A Bhedase
Top
Sat, 2007-06-30 05:56
#2
ulysses garcia
User offline. Last seen 13 years 25 weeks ago. Offline
Joined: 22 Aug 2005
Posts: 259
Groups: GPC Qatar

I need to refesh my point, the contractor has submitted the schedule without mandatory date constraint in the start date and finished date,

Is this type of schedule valid? Legally or Technically!!
Top
Fri, 2007-06-29 09:11
#3
Bernard Ertl
User offline. Last seen 9 years 32 weeks ago. Offline
Joined: 20 Nov 2002
Posts: 757
Groups: Petro-Chem / Oil & Gas, TURNAROUND & SHUTDOWN (T/A & S/D)
Mandatory or Early Constraint

Date Constraints

Bernard Ertl
InterPlan Systems
Top