 |
|
 |
Conventional manual HAZOP |
|
TASK |
TIME |
|
|
Preparation stage
chairman and scribe (2 men) |
|
|
|
Assemble plant data:
P&ID
process data
cause / effect charts
vendor package data
plant layout
|
6.0 |
|
|
Summarise process |
2.0 |
|
|
Divide P+ID into sections and nodes |
2.0 |
|
|
Plan analysis sequence |
2.0 |
|
|
Mark-up P&ID |
1.0 |
|
|
Make list of keywords for each section |
1.5 |
|
|
Prepare and populate section tables |
5.0 |
|
|
Total preparation manhours 19.5 hours for
2 men |
39.0 |
|
|
Team analysis stage
chairman, scribe, and 3 engineers |
|
|
Study first section
Apply guidewords to first node
Trace consequences
Evaluate consequences
Repeat until all nodes considered
|
2.0 |
|
|
Study second and subsequent sections until all sections studied (2.0/section, say 4 sections) |
8.0 |
|
|
Prepare HAZOP report |
4.0 |
|
|
Total analysis manhours 14 hours for 5 men |
70.0 |
|
|
Total HAZOP manhours |
109.0 |
|
 |
|
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