By keeping same quantity of resources but by varying their productivity you are keeping constant the amount of resources but the projected duration of the activity will change, therefore there is no linear relationship here between quantity and duration. In addition the driving resources can vary as you change composition of the crew. Yes resource production is not always a linear function, usually it is not, it is more complicated.
Take for example an earth moving crew of one excavator with a capacity of 100 cm/hr and 8 trucks with a capacity to move dirt at a rate of 10 cm/hr based on the average round trip of one round trip per hour. The crew capacity will be limited by the amount of trucks to 80 cm/hr. If you increase the amount of trucks to 20 the crew production will be limited by the capacity of the excavator 100 cm/hr.
What MR Weaver is calling for I would say is always present, download the PDFs and keep them for future reference.
Patrick,
Thanks for the reference, keep posting these, they are valid no matter what software you are using.
Best regards,
Rafael
Member for
24 years 9 months
Member for24 years9 months
Submitted by Patrick Weaver on Sat, 2011-01-29 02:25
There is absolutely no direct relationship between the quantity of work, crew size and durations. The total fallacy of this concept was clearly demonstrated by Frederick P. Brooks Jr. in his book, The Mythical Man Month first published in 1975 (I’ve got the 20th anniversary edition from 1995).
To actually understand what’s involved in setting durations see:
Member for
21 years 8 monthsBy keeping same quantity of
By keeping same quantity of resources but by varying their productivity you are keeping constant the amount of resources but the projected duration of the activity will change, therefore there is no linear relationship here between quantity and duration. In addition the driving resources can vary as you change composition of the crew. Yes resource production is not always a linear function, usually it is not, it is more complicated.
Take for example an earth moving crew of one excavator with a capacity of 100 cm/hr and 8 trucks with a capacity to move dirt at a rate of 10 cm/hr based on the average round trip of one round trip per hour. The crew capacity will be limited by the amount of trucks to 80 cm/hr. If you increase the amount of trucks to 20 the crew production will be limited by the capacity of the excavator 100 cm/hr.
What MR Weaver is calling for I would say is always present, download the PDFs and keep them for future reference.
Patrick,
Thanks for the reference, keep posting these, they are valid no matter what software you are using.
Best regards,
Rafael
Member for
24 years 9 monthsThere is absolutely no direct
There is absolutely no direct relationship between the quantity of work, crew size and durations. The total fallacy of this concept was clearly demonstrated by Frederick P. Brooks Jr. in his book, The Mythical Man Month first published in 1975 (I’ve got the 20th anniversary edition from 1995).
To actually understand what’s involved in setting durations see: