GERT


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Related to GERT: GERD, acid reflux

GERT

A procedure for the formulation and evaluation of systems using a network approach. Problem solving with the GERT (graphical evaluation and review technique) procedure utilizes the following steps:

  • 1. Convert a qualitative description of a system or problem to a generalized network similar to the critical path method—PERT type of network.
  • 2. Collect the data necessary to describe the functions ascribed to the branches of a network.
  • 3. Combine the branch functions (the network components) into an equivalent function or functions which describe the network.
  • 4. Convert the equivalent function or functions into performance measures for studying the system or solving the problem for which the network was created. These might include either the average or variance of the time or cost to complete the network.
  • 5. Make inferences based on the performance measures developed in step 4.

Both analytic and simulation approaches have been used to perform step 4 of the procedure. GERTE was developed to analytically evaluate network models of linear systems through an adaptation of signal flow-graph theory. For nonlinear systems, involving complex logic and queuing situations, Q-GERT was developed. In Q-GERT, a simulation of the network is performed in order to obtain statistical estimates of the performance measures of interest.

GERT networks have been designed, developed, and used to analyze the following situations: claims processing in an insurance company, production lines, quality control in manufacturing systems, assessment of job performance aids, burglary resistance of buildings, capacity of air terminal cargo facilities, judicial court system operation, equipment allocation in construction planning, refueling of military airlift forces, planning and control of marketing research, planning for contract negotiations, risk analysis in pipeline construction, effects of funding and administrative strategies on nuclear fusion power plant development, research and development planning, and system reliability. See PERT, Simulation

References in periodicals archive ?
"But at the end of the day, I think Chase completely loves Gert and Gert completely loves Chase and so there's a special bond there," Sulkin added.
He said: "The remnants of Hurricane Gert could bring better weather for Wales, at least for a time, but it could go the other way.
Hurricane Gert is currently a category one storm and is the north Atlantic's second hurricane this year.
Vilandre and Gaudet would be terrific in a production of "The Odd Couple,'' a consideration that came to mind after Leo is embarrassed to confess to Pat that he's having "performance issues,'' and worried that Gert is going to leave him if he doesn't "rise to the occasion.''
When Gert Joubert turned 60, South African newspapers reported that he gave 60 special friends a small one-hectare plot in the massive ranch, as a personal gift from the property developer tycoon.
Gert Strand AB supplies topnotch whiskey yeast to whiskey distilleries.
Andy Carson, architectural sales manager at Welsh Slate, said: "Gert Wing...rdh is a highly-respected figure in Scandinavian architecture.
"Unfortunately Gert fell ill earlier in the week," said head coach Declan Kidney.
The National Hurricane Center in Miami said Sunday that a tropical storm warning has been issued for Bermuda, though Gert's center was still about 255 miles (410 kilometers) from the islands.
Gert is well-known for arguing that Hobbes used "reason" in importantly different ways.
"I would like to take this opportunity to express our appreciation to Gert for his contribution and efforts to improve Batelco's Bahrain operations over the past 18 months.
The other presentation was by Gert Floor who gave an account of courses given in the public library of the Heiloo village (northern Holland).