Guide to Good Practice in The Management of Time in Major Projects. Dynamic Time Modelling (PDF)

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About

Edition: 2018
Pages: 246
Author(s): CIOB
Publisher: CIOB
Language: English
Size: 160 Mb

Content:

Preface xi
Introduction to Second Edition xiii
Acknowledgements xv
Table of Figures xvii
1 Introduction 1
1.1 Core principles of time management 1
1.2 The dynamic time model 4
1.3 Mission statement 6
1.4 Genesis of the Guide 7
1.5 Purpose of the Guide 7
1.6 Risk management 8
1.7 Planning and scheduling 9
1.8 The planning method statement 10
1.9 The project scheduler 10
1.10 Time management 11
1.11 Building information modelling 12
2 Strategy 13
2.1 Planning method statement strategy 13
2.2 Consultant and contractor selection strategy 14
2.3 Contracting strategy 15
2.4 Project planning strategy 16
2.5 Progress record strategy 17
2.6 Schedule design strategy 18
2.7 Schedule update strategy 18
2.8 Schedule revision strategy 19
2.9 Time risk management strategy 20
2.10 Schedule quality control strategy 22
2.11 Building information modelling strategy 22
2.12 Communication strategy 23
3 The dynamic time model 25
3.1 Introduction 25
3.2 The initial development schedule 27
3.3 The updated development schedule 28
3.4 Calculating the predicted effect of intervening events
on the development schedule 30
3.5 Planning to overcome the predicted effects
of an intervening event 31
3.6 Revision of the development schedule 32
3.7 Time management of pre-construction activities 33
3.8 The initial working schedule 33
3.9 The updated working schedule 34
3.10 Calculating the predicted effect of intervening events
on the working schedule 36
3.11 Planning to overcome the predicted effects
of an intervening event 37
3.12 Revision of the working schedule 38
3.13 Continuing time management of construction activities 39
3.14 Benchmarking 40
4 Developing the dynamic time model 41
4.1 Introduction 41
4.2 Schedule density design 42
Scheduling at Low Density 43
Scheduling at Medium Density 43
Scheduling at High Density 44
4.3 Planning method statement 44
Planning method statement at Low Density 45
Planning method statement at Medium Density 46
Planning method statement at High Density 46
Documentation of corrections 46
4.4 Software considerations 47
4.5 The structure of the schedule 48
4.6 Schedule types 48
The Development schedule 49
Tender schedule 49
Working schedule 49
Occupational commissioning schedule 50
As-built schedule 50
4.7 Schedule design 50
4.8 Schedule integration 51
Schedule subcontracting 52
Master schedule and subproject 52
Milestone management 53
4.9 Risk and contingencies 53
Contingencies at Low Density 54
Contingencies at Medium Density 56
Contingencies at High Density 56
4.10 Scheduling techniques 56
Bar charts 57
Line-of-balance diagram 57
Time chainage diagram 58
Arrow diagram method (ADM) 59
Precedence diagram method (PDM) 60
Linked bar chart 61
Building information modelling 61
4.11 Work breakdown structure 62
4.12 Schedule communication 64
Executive summary report 66
Senior management report 66
Project manager’s report 66
Section manager's report 66
Short-term look-ahead report 67
4.13 Calendars 67
Calendars at Low Density 70
Calendars at Medium Density 70
Calendars at High Density 70
4.14 Work type definition 70
4.15 Activity identifier coding 70
Activity ID at Low Density 71
Activity ID at Medium Density 71
Activity ID at High Density 71
Activity ID trailing numbers 72
Simplified Activity ID 73
4.16 Activity description 74
Descriptions at Low Density 74
Descriptions at Medium Density 74
Descriptions at High Density 74
4.17 Activity content codes 75
4.18 Activity cost codes 76
Cost coding at Low Density 77
Cost coding at Medium Density 77
Cost coding at High Density 77
4.19 Activity duration 78
Estimating durations using industry standards 79
Estimating durations using benchmarking 79
Estimating activity duration by comparison
with other projects 79
Calculating activity duration from resources
and work content 80
Specified activity duration 80
Activity duration at Low Density 81
Activity durations at Medium Density 81
Activity durations at High Density 81
4.20 Resource scheduling 82
Resources at Low Density and Medium Density 83
Resources at High Density 83
Strategic resource allocation 85
4.21 Permits and licences 86
4.22 Utilities and third-party projects 87
4.23 Schedule logic 87
Engineering logic 87
Preferential logic 88
Resource logic 88
Zonal logic 88
4.24 Density logic 88
4.25 Activity logic 89
Start-to-start 89
Finish-to-finish 89
Finish-to-start 90
Start-to-finish 90
Computational inconsistencies 90
4.26 Lags 90
Lagged finish-to-finish 91
Lagged finish-to-start 91
Lagged start-to-start 92
Lagged start-to-start and finish-to-finish 92
Negative lag 93
Lags at Low Density 93
Lags at Medium Density 93
Lags at High Density 93
4.27 Logical constraints 94
Flexible constraints 94
Moderate constraints 94
Inflexible constraints 95
Inflexible combinations of constraints 96
4.28 Float 96
Free float 97
Total float 97
Negative float 97
4.29 Critical path 97
4.30 Schedule quality assurance 99
Review for buildability 100
Review for schedule content 100
Review for schedule integrity 102
Review for constraints 103
Review for open ends 103
Review for long lags 103
Review for negative lags 104
Review for ladders 104
Review for scheduling options 105
Review for critical paths 105
5 Managing the dynamic time model 107
5.1 Introduction 107
5.2 Data communication systems 109
5.3 Building information modelling 110
5.4 Record-keeping 111
Spreadsheet-recorded data 111
Database-recorded data 111
Record types 114
5.5 Progress records 114
Progress record content 114
Activity identification data 115
Activity description 115
Date of record 115
The resource 115
Start and finish dates 116
Author of the record 116
Progress data 116
Quality control records 117
Information flow records 117
5.6 Updating the schedule 118
5.7 Schedule review and revision 119
Review for better information 120
Better design information 120
Better procurement information 120
Refinements to work content 120
Review for short-term work 120
Change in methodology 121
Repetitive activities 121
Change in activity descriptions 122
Change in estimated activity durations 122
Change in logic 122
Change in cost profile 122
Consequential change in criticality 123
5.8 Change control 124
Identifying intervening events 124
Voluntary and implied variations and other
instructed changes 126
Variations 126
Prime cost and provisional sums 126
Employer’s acts or omissions 127
Acts or omissions of third parties 129
Neutral events 129
Disruption 129
Calculating the effect of intervening events 129
5.9 Progress monitoring 131
Schedule comparison 131
Baseline target schedule (static) 132
Variable baseline target (dynamic) 133
Delay caused by a contractor’s risk event 133
Delay caused by an employer’s risk event 134
Jagged line 134
Count the squares 134
Milestone monitoring 135
Cash-flow monitoring 136
Earned-value management 136
Resource monitoring 138
Building information modelling 138
5.10 Acceleration and recovery 138
6 Communicating the dynamic time model 141
6.1 Introduction 141
6.2 Proactive communication: promoting the plan 141
6.3 Reactive communication: reporting 142
6.4 Report types 143
Contractual notice 143
Managerial reports 145
Executive summary 145
6.5 Reporting formats 147
6.6 Feedback and benchmarking 147
APPENDICES 151
Appendix 1 - Time risks that may be borne by the employer 151
Appendix 2 - Case studies in strategic planning 155
Appendix 3 - The nature of complex projects 167
Appendix 4 - The dynamic time model - a flow chart 169
Appendix 5 - Case studies in high density scheduling contents 173
Appendix 6 - Desirable attributes of scheduling software 179
Appendix 7 - Industry productivity guides 189
Appendix 8 - Sample notice of delay 191
Glossary of terms 193
Index 213

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