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                                      S-Curve from Productivity Data

                                      8 replies [Last post]
                                      Emmanuel Udo
                                      User offline. Last seen 1 year 31 weeks ago. Offline
                                      Joined: 10 Feb 2004
                                      Posts: 14
                                      Gents,
                                      Can somebody advise me on how to produce planned s-curve using productivity data. I have always used manhours but I know some people use productivity data. How is it done?

                                      Emmanuel

                                      Replies

                                      Daniel Limson
                                      User offline. Last seen 1 year 2 days ago. Offline
                                      Joined: 13 Oct 2001
                                      Posts: 318
                                      Groups: None
                                      You can use excel worksheet to produce your plan progress curve. Again you need to have a common unit of measure. In your case its number of joints. you need to decide on the time basis (weekly, monthly or daily) Then plot your production rates against time and make a cumulative one on another row. Base on this you can produce your s-curve and this will tell you how long it will take you to finish 5000 joints using your production rates.

                                      Hope this helps.

                                      Regards,
                                      Daniel
                                      Emmanuel,
                                      this approach is available in Spider Project. It is common in Russia and I always wondered why other PM software does not do the same.
                                      Regards,
                                      Vladimir
                                      Emmanuel Udo
                                      User offline. Last seen 1 year 31 weeks ago. Offline
                                      Joined: 10 Feb 2004
                                      Posts: 14
                                      Thanks, Bernard, for the write-up but it does not address the issue I raised.
                                      For example, if you were required to plot a Fab S-curve for 5000 joints of piping it should be possible to plot the s-curve based on standard productivity of say 24 Dia-inch/hour.
                                      This is not the same as using manhours, although one could use this to determine the resource and manhour requirement.
                                      Cheers.


                                      Emmanuel

                                      Are you sure that there is not a demand?
                                      At this site people collect data on production rates. Why?
                                      People were just are used for the software restrictions.
                                      Vladimir
                                      Bernard Ertl
                                      User offline. Last seen 5 years 32 weeks ago. Offline
                                      Joined: 20 Nov 2002
                                      Posts: 757
                                      I don’t understand why it is not presented in most PM software.If there was a demand for this functionality in the marketplace, it would have been a standard feature in all packages long ago IMO.

                                      Bernard Ertl
                                      ATC Professional Shutdown / Turnaround Management System
                                      Bernard,
                                      manhours are not the same as physical volumes and productivities not only of man power but also of equipment, machinery, etc. I mean using real production rates or productivities (m3 per hour, something like that).
                                      I don’t understand why it is not presented in most PM software. It is easy, not like resource constrained schedule optimization or shift simulation.
                                      Regards,
                                      Vladimir
                                      Bernard Ertl
                                      User offline. Last seen 5 years 32 weeks ago. Offline
                                      Joined: 20 Nov 2002
                                      Posts: 757
                                      Not all other software Vladimir!

                                      We track physical progress (% of earned manhours) against a historical/statistical minimum attainment curve based on the desired timeframe. I wrote a short page on the subject (with refinery/petrochemical plant turnaround projects as the focus):

                                      Summary Progress Curves

                                      Bernard Ertl
                                      ATC Professional Shutdown / Turnaround Management System
                                      Using Spider Project it is easy, other software is based on duration estimations.

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