A network diagram is drawn up in the form of a schematic diagram that reflects the operations and components of production processes. The resulting structure shows the relationship between all operations, their order, as well as the technological distribution of their implementation. In this case, the main elements in the design of the network diagram are "work" and "event", depicted graphically.
Instructions
Step 1
Determine the minimum, but at the same time, acceptable time to complete all the necessary work. This will be the duration of the critical path. For these purposes, create a matrix in which the rows correspond to the starting events, and the columns will reflect the ending events.
Step 2
Sign at the very top of the columns their names, which will determine the content of the schedule: work code, duration of work, content of work, initial event, final event, performer.
Step 3
Fill in the resulting matrix, row by row. Start with the first one, putting down numbers indicating the duration of the work, going out of the initial event and entering the last one. The first job should not have an initial event and duration. Therefore, do not enter it into the matrix, but start filling out the diagram from 2 work at once.
Step 4
Enter the initial value, it will determine the 1st day of the month. In the column representing the final values, put the number 2 - this is the 2nd day of the month. In this case, the entire duration is, as a rule, equal to 30 days. Therefore, put the number 30 in the first row of the second column. Then fill in the entire matrix in the same way.
Step 5
Compare all the paths obtained and choose the one on which the duration of all available jobs will be the longest. This path will be critical. It is from the works that lie on the critical path, as well as their duration, that the final period of the plan will depend. Thus, the critical path will be the basis for optimizing the plan.
Step 6
Build a network diagram for the product and implementation of the process under consideration. In doing so, use the data from the resulting table and matrix. In this case, if the duration of the entire critical path does not correspond to the target date, then it is necessary to analyze the resulting network schedule, and then optimize it in time.
Step 7
In the event that the shortest period is required for the implementation of the plan, then in order to reduce it, it is necessary to reduce the duration of the work lying on the critical path.
