This standard specifies the common terms and graphic symbols for network planning technology. This standard applies to the preparation of network plans. JB/T 5056.1-1991 Network planning technical terminology and graphic symbols JB/T5056.1-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T5056.1~5056.2—91
Network Planning Technology
Published on May 17, 1991
Published by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Implemented on July 1, 1992
Mechanical Industry Standard of the People's Republic of China
Network Planning Technology
Graphic Symbols
1 Main Content and Scope of Application
This standard specifies the common terms and graphic symbols of network planning technology. The standard is applicable to the preparation of network planning. 2 Terminology
2.1 Operation
It refers to the process of an activity that takes time and consumes resources or only takes time without consuming resources. 2.2 Pre-project work
Projects or tasks that must be completed before a project can start. 2.3 Post-project work
Projects that must be completed before a project can start. 2.4 Tasks
The state of a project before it starts. 2.5 Network
The description of the interdependence and relationship between tasks and tasks or between tasks. 2.6 Network diagram
The network that is expressed in the form of a diagram using specified symbols. 2.7 Linear network diagram
A network diagram that uses nodes to represent a project. 2.8 Node grid
A network diagram that uses nodes to represent a project. 2.9 Time to complete a project
The actual time required to complete a project. 2.10 Earliest start time of an event
The earliest start time of an event that can occur under the influence of both logically necessary and mandatory factors in the network. 2.11 Late end time of a project
JB/T 5C55.-91
The latest end time of an event that can occur under the influence of logically necessary and mandatory factors in the network, but does not affect the completion time of the project: 2.12 Operation start time
The time when an operation can start under the influence of logically necessary and mandatory factors in the network. 2.13 Operation late start time
The start time of an operation under the influence of logically necessary and mandatory factors in the network, but does not affect the completion time of the project. 2.14 Earliest finishing time of an operation
Approved by the Ministry of Machinery and Electronics Industry on May 17, 1991, implementation of 1332-7-0
JB/T5056.1-91
The earliest time when an operation may be finished under the influence of inevitable and compulsory factors in the network. 2.15 Latest finishing time of an operation
The latest finishing time of an operation
The time when an operation is finished late under the influence of inevitable and compulsory factors in the network, which does not affect the completion time of the work. 2.16 Event time difference
The difference between the latest completion time of an event and the earliest start time of an event. 2.17 Total time difference
The flexible time that can be deduced when an operation is completed without affecting the start plan. 2.1B Line
In the network diagram, starting from the starting event (starting operation), along the path that can be continuously connected to the final production item (final operation) as indicated in the figure
2.19 Related lines
The line connecting events with a time difference of rate or the line of operations with a total time difference of quarter. Graphic symbols
Graphic symbols of arrow-type network diagrams are as shown in Table 1.
Allowed business flow
Single time
The following business: source,
Business arrow|| tt||virtual operation new line
difference operation arrow type
related business energy frequency
indicates the operation and operation station step connection point, the operation of the work indicator, the subsequent operation and the part in the network spectrum, which not only consumes the same resources but also consumes the original (manpower, material and financial resources), and the connection line can not consume resources. The operation can not be written in the network spectrum. The source
please note that the network spectrum does not occupy the resources between the two things, nor can it be used to interact with each other. The operation on the whole line is decorated with small related parts. The operation on the whole line is decorated with related certificates. The operation on the operation device is used
3.2 point network diagram graphic number table 2.
TB/T5056.1—91
continued table:
medical mouth method
time grid
Start time of the class and the end time of the assignment
Operation name or code
Requirements
Most selective total time and average time Earliest start time
Assignment name
Execution time
Latest start time
Use first)
(Simplified:
Sequential
Indicates the connection between two or more networks and the same network
Indicates the time for important items to be completed
Indicates the time (used in the same time segment)
Indicates the time and cost of two assignments within a network The network code of a key line is as shown in Table 3./15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91/15055.91 The special number of the network diagram is only reduced to an inch
national network national solid symbol training system. See the Yin record A (reference) 4
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complete the possible time of the productwwW.bzxz.Net
complete or the possible time of the industry to complete the English work book can be carefully product time
A1 number
Jt:T 5056.97
Appendix A
network diagram graphic symbol drawing size
(examination file)
the numbers in the network diagram graphic symbol represent the proportion, the corresponding size can be enlarged according to the corresponding proportion, A2 line network diagram
front line network graphic symbol drawing scale design see figure! Figure:
A3 Node network diagram
Node network is drawn with the same symbol as Figure A2. Figure A2
A4 Line network diagram and node network are reserved
/T5056.1-97
Line network diagram and node network diagram are marked with the same symbol as Figure 3,> for intentional
A5 Arrow lines or node outlines used to represent operations are thick solid lines. Additional notes:
This standard was proposed by the Machinery Standardization Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by the Machinery Standardization Research Institute of the Ministry of Machinery and Electronics Industry, Tianjie Industrial Fan Company, Beijing Switch Factory, Tianjian Lock Bureau Standard Work Station, and Dajin Hanmen Company.
This standard was drafted by Beijing people Zhuang Xiangzhen, Li Baofa, Shi Fengqi, Ka Zhiqiang. Yan Chahui, Jing: 5
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