Website Upgrade Incoming - we're working on a new look (and speed!) standby while we deliver the project

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.

Productivity rates for design activities

4 replies [Last post]
Tue, 2009-04-21 04:10
Gary Whitehead
User offline. Last seen 6 years 4 weeks ago. Offline
Joined: 24 Mar 2009
Posts: 1215
Groups: Building Information Modelling, Content Moderators, Petro-Chem / Oil & Gas, The GrapeVine
Can anyone suggest any good resources for productivity rates on design activities? Specifically O&G sector?

I’m trying to build up what I can based on previous projects, but my firm doesn’t have an activity-based timesheet system so I have no way of tracking actuals. Estimates on previous projects often aren’t broken down beyond the discipline and when they are, they vary wildly (eg a bar bending schedule should take anywhere from 3 to 20 manhours, depending on who did the estimate...)

Normally I’d go to the designers themselves but as I say, their previous estimates have not been consistent. Also they are mainly contractors in a design office without much work on, and in the current climate I am wary of the self-preservation instinct leading to over-inflated estimates.
Top

Replies

Thu, 2009-04-23 07:00
#1
Gary Whitehead
User offline. Last seen 6 years 4 weeks ago. Offline
Joined: 24 Mar 2009
Posts: 1215
Groups: Building Information Modelling, Content Moderators, Petro-Chem / Oil & Gas, The GrapeVine
Many thanks, Rafael. This is just the kind of thing I am looking for.
Top
Thu, 2009-04-23 06:31
#2
Rafael Davila
User offline. Last seen 18 weeks 6 days ago. Offline
Joined: 1 Mar 2004
Posts: 5241
Groups: Spider Project Team
May I suggest the following reference from the Gulf Publishing Company:
Title: Conceptual Cost Estimating Manual
ISBN 10: 0884152677
Author: John S. Page
Pages: 326
Edition: Second Edition
Binding: Paperback
Price: $120.00 Single Price
"This printing gives the construction industry and the management staff of chemical, refinery, and industrial plants the information they need to generate fast, reasonably accurate costs for designing and constructing a specified facility"
You can follow the links:
http://www.amazon.com/Conceptual-Cost-Estimating-Manual-Reprint/dp/08841...
http://www.gulfpub.com/default.asp?page=14&productID=2706&VS=
I give the reference "as is", I am not into Oil and Gas but as a Civil Works Contractor quoted a couple of Civil Works jobs for the Oil & Gas Industry one of which was a Loading Dock/"Berth". My client was awarded the job.
Top
Wed, 2009-04-22 03:56
#3
Gary Whitehead
User offline. Last seen 6 years 4 weeks ago. Offline
Joined: 24 Mar 2009
Posts: 1215
Groups: Building Information Modelling, Content Moderators, Petro-Chem / Oil & Gas, The GrapeVine
Yes, I use the DDR (Design Documents Register) as the basis for the schedule activities (IFC, IFA, etc). It is very sensible to have the schedule mirror the DDR to ensure common reporting.

The problem I am having is more around getting reliable estimates for the productivity rates / durations of the design activities.
Top
Wed, 2009-04-22 03:30
#4
Anoon Iimos
User offline. Last seen 3 years 24 weeks ago. Offline
Joined: 22 Sep 2006
Posts: 1422
Groups: Pinoy Planning Planet Community
Gary,

It seems that "design activities" are very difficult to plan.

I may suggest to make it simple, like steps or "Document Register"; or "Drawing(s) Register"

suggestions from anyone?

Top