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COBie was developed by Bill East, of the US Army Corps of Engineers, while at the Construction Engineering Research Laboratory in 2007. [3] The project was funded with an initial grant from the US National Aeronautics and Space Administration and the White House Office of Science and Technology Policy (through National Institute of Standards and Technology).
These projects are called repetitive or linear projects. The main advantages of LSM over critical path method (CPM) is its underlying idea of keeping resources continuously at work. In other words, it schedules activities in such a way that: resource utilization is maximized;
The project has two critical paths: activities B and C, or A, D, and F – giving a minimum project time of 7 months with fast tracking. Activity E is sub-critical, and has a float of 1 month. The critical path method ( CPM ), or critical path analysis ( CPA ), is an algorithm for scheduling a set of project activities. [ 1 ]
Control charts are graphical plots used in production control to determine whether quality and manufacturing processes are being controlled under stable conditions. (ISO 7870-1) [1] The hourly status is arranged on the graph, and the occurrence of abnormalities is judged based on the presence of data that differs from the conventional trend or deviates from the control limit line.
Charts of the type published by Schürch appear to have been in common use in Germany at the time; [12] [13] [14] however, the prior development leading to Schürch's work is unclear. [15] Unlike later Gantt charts, Schürch's charts did not display interdependencies, leaving them to be inferred by the reader.
The first structured method for documenting process flow, e.g., in flow shop scheduling, the flow process chart, was introduced by Frank and Lillian Gilbreth to members of ASME in 1921 as the presentation "Process Charts, First Steps in Finding the One Best Way to Do Work". [2]
Man-hour rate = man-hours required for work / completed work quantity. Example: Excavation 0.125 mh/cy. The man-hour rate is related to the inverse of the production rate times the number of workers in the crew performing the work. Example: Excavation at 8 cy/day (8-hour day) with 2-man crew = 2 x 8 / 8 = 2 man-hours/cy. See also Production rate.
A time–distance diagram is a chart with two axes: one for time, the other for location. The units on either axis depend on the type of project: time can be expressed in minutes (for overnight construction of railroad modification projects such as the installation of switches) or years (for large construction projects); the location can be (kilo)meters, or other distinct units (such as ...
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