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FF relationship in delay analysis

7 replies [Last post]
Wed, 2009-09-09 23:28
Shah. HB
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Is it true that use of FF link is more in EOT program?
Is it true that activity linked to successor with SS and FF could be brought down to critical activities?
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Replies

Fri, 2009-09-11 04:22
#1
Andrew Flowerdew
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Hi Mike,

You want to dig in an Irish bog, dig hole, put pump(s) in, keep digging, lol, no lag.

I’ve also known odd’s and sods of blockwork to be built and plastered in the same day.

You’re right that there are very few activities that you’d probably ideally plan that way, but never say never!!!
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Fri, 2009-09-11 02:43
#2
Mike Testro
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Hi Andrew

My point was in respect of simultaneous SS FF relationships.

Your two examples both involve a degree of lag.

Best regards

Mike Testro
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Thu, 2009-09-10 19:19
#3
Andrew Flowerdew
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Mike,

Feeling of da ja vue here,

"No one yet on PP has been able to show me a valid circumstance where one trade activity cannot finish unless another one does"

Plastering a wall and completion of blockwork or brickwork or studwork - can’t complete the plastering until every block or brick or bit of studwork is in place!

"where two activities MUST start together"

Would have to be a SS link with no lag to mean MUST start together - can think of the odd thing with no lag that probably MUST start together, eg, excavation and sump pump dewatering system.

Agree SS & FF links should be avoided in detailed construction programmes, FS links being preferred but there are occassions when they are valid.
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Thu, 2009-09-10 09:53
#4
Rafael Davila
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That was good, thanks you made my day.

Best regards,
Rafael
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Thu, 2009-09-10 08:56
#5
Mike Testro
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Hi Rafael

Cruella is a splendid role model.

Her planning was excellent but she was let down by her team of useless time wasters.

Best refards

Mike Testro
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Thu, 2009-09-10 08:02
#6
Rafael Davila
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Mike

You are a villain, reminds me of Cruella de Vil.

This time I will not get into the issue and let Shahul follow your suggestion if he wishes. It would be good to hear from his experience if he survives his team reaction after suggesting such radical and obsolete approach.

Best regards,
Rafael
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Thu, 2009-09-10 03:00
#7
Mike Testro
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Hi Shahul

SS & FF links have no place in construction planning at all.

FF links are used to create flawed logic when SS lead lag links are in place and the link point is overtaken by the progress date.

No one yet on PP has been able to show me a valid circumstance where one trade activity cannot finish unless another one does or where two activities MUST start together.

Since SS & FF links have no place in construction planning they are anathema in EoT.

Go and read the thread I started last year on "Ban these planning abominations" - it was a lively discussion.

Best regards

Mike Testro

PS now wait for Rafael & Vladimir to come piling in again.
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