tailieunhanh - Project Planning and Control Part 5

Thật không dễ để xác định trách nhiệm của một quản lý dự án, chủ yếu là do phạm vi bao phủ bởi một vị trí khác nhau không chỉ từ trong các ngành công nghiệp lẫn nhau mà còn từ công ty này tới công ty khác | 21 Subdivision of blocks One major point which requires stressing covers the composition of a string of activities. It has already been mentioned that the site should be divided into blocks which are compatible with the design networks. However each block could in itself be a very large area and a complex operational unit. It is necessary therefore to subdivide each block into logical units. There are various ways of doing this. The subdivision could be by 1 Similar items of equipment 2 Trades and disciplines 3 Geographical proximity 4 Operational systems 5 Stages of completion. Each subdivision has its own merits and justifies further examination. 1 Similar items of equipment Here the network shows a series of strings which collect together similar items of equipment such as pumps tanks vessels boilers and roads. This is shown in Figure . Project Planning and Control Cast Excavate founds. Pump A Align Hardening Set punip motor Pump B zz PumP C d dd C KD ZZ Construct Excavate base Tank A Construct Erect Erect Erect pad tank bott. shell roof Tank B d O O zzz o TankC CZ d ZZ Cast Excavate founds. Exchanger A Cast Erect pipe Harden - exchangCT Insulate Exchanger B Cd d_ CIZ CZ Exchanger C J J Figure Similar items of equipment Advantages a Equipment items are quickly found b Interface with design network is easily established. 2 Trades and disciplines This network groups the work according to type. It is shown in Figure . Advantages a Suitable when it is desirable to clear a trade off the site as soon as completed b Eases resource loading of individual trades. 3 Geographical proximity It may be considered useful to group together activities which are geographically close to each other without further segregation into types or trades. This is shown in Figure . 166 Subdivision of blocks Establish site RACK 1 PUMPS Instrument Deliver machines Shutter reinf. Erect steel Lay pipes Shutter Cast reinf. founds Panes Build footpaths Big. structure POND level .