University:
California State University, Northridge
Course:
SOC 150 | Introductory Sociology
Academic year:

2024
Views:

261

Pages:

2
Author:

Amel S.

How to Draw a Network Diagram in Network Planning According to Jay Heizer and Barry Render translated by Kresnohadi Arinoto (2001:780) the steps are as follows. a. Inventorying activities, in this step, the project scope is assessed and defined, describing or breaking it down into activities or groups of activities that are project components. b. Arranging relationships between activities, in this step, the components in the first point are rearranged according to the logic of dependency. c. Arranging a network diagram that connects all activities, in this step, the relationships between activities that have been arranged in the second point are arranged into a chain with a sequence that is in accordance with the logic of dependency. d. Determining the time for each activity, providing a time period for each activity that is produced to describe the scope of the project, as mentioned in the first step. There is a fundamental difference in estimating the time period of activities between CPM and PERT. The first uses a single or deterministic estimate, while the second uses three or probabilistic estimates. e. Identifying the critical path on the network diagram, at this stage, from the network diagram compiled in the third point, forward and backward calculations are carried out. From both calculations, the float is calculated and the critical path is identified. f. Conducting time, cost and resource analysis, after the steps above are completed, continue by conducting time, cost and resource analysis which includes. 1) Determining the most optimal project period in terms of cost. Indicated to select various alternative project periods in terms of cost. 2) Minimizing fluctuations in resource usage 3) Intended to increase the efficiency of project processing, by preventing as far as possible sharp ups and downs in time relative to resource requirements, such as labor requirements. In addition, in the preparation or depiction of the Network Diagram as a followup or realization of Network Planning, several things need to be considered as follows. a. The length, shortness or slope of the arrow has no meaning at all in terms of the layout of the work, the amount of duration or resources needed. b. The size of the circle also has no meaning in terms of the importance of an event. c. What activities precede and what activities follow. d. What activities can be done together. e. The activities are limited when they start and when they finish. f. The time, cost, and resources needed for the activities. g. The head of the arrow is a guideline for the direction of each activity. h. The arrow always connects two nodes, the direction of the arrow indicates the time sequence. To arrange the symbols above, they can be arranged to resemble a Network Diagram that is adjusted to the project framework, as follows. Figure 1 Figure 2 The first Network Diagram image has an explanation that activity A must be carried out before activity B and also before completing activity 3, activities 1 and 2 must be completed. While the second image has an explanation that the beginning of all activities is activity 1 and to complete the entire project, after activity 1 there are 3 activities that must be completed, namely completing activities 2, 3 and 4 then carrying out activities 5 and 6.