Simple Guide to SQRA

1. How to Prepare for
Schedule Quantitative
Risk Analysis (SQRA)
Author : Rufran C. Frago, P. Eng., PMP®, CCP, PMI-RMP®
Revision 1: 15Jul13

2. 071513-How to Prepare for SQRA by RCF Page 2 of 38 7/7/2015
Revision 1: 15Jul2013 Copyright
How to Prepare For
Schedule Quantitative
Risk Analysis (SQRA)
Table of Contents
I. Summary...................................................................................................................... 4
II. Objectives ................................................................................................................ 7
III. Definitions and Acronyms....................................................................................... 7
IV. Related Tools and Applications............................................................................... 7
V. General Preparation Guidelines to SQRA ............................................................... 7
VI. What planning inputs are required for a successful SQRA?.................................. 12
VII. Who are required to participate in a SQRA? ......................................................... 14
VIII. Ready for SQRA Criteria or Minimum Schedule Quality (MSQ)..................... 15
1) Hard or Mandatory Constraints ............................................................................. 15
2) Soft Constraints...................................................................................................... 16
3) As Late As Possible ............................................................................................... 16
4) Missing Predecessors............................................................................................. 18
5) Missing Successors ................................................................................................ 18
6) Open Start (Danglers) ............................................................................................ 19
7) Open Finish (Danglers).......................................................................................... 20
8) Negative Float........................................................................................................ 21
9) Out of Sequence Activities .................................................................................... 22
10) Excessive Float................................................................................................... 23
11) Milestone to Activity Ratio................................................................................ 24
12) Links to Activity Ratio....................................................................................... 25
13) Activities with External Link............................................................................. 27
14) FS Negative lags (or Leads)............................................................................... 28
15) SS Negative lags (or Leads)............................................................................... 30
16) FF Negative lags (or Leads)............................................................................... 32
17) SF Relationships................................................................................................. 34
IX. Potential Consequences of Poor Schedule Quality................................................ 35
X. Bibliography .......................................................................................................... 37
XI. Index ...................................................................................................................... 38

3. 071513-How to Prepare for SQRA by RCF Page 3 of 38 7/7/2015
Revision 1: 15Jul2013 Copyright
How to Prepare For
Schedule Quantitative
Risk Analysis (SQRA)

4. 071513-How to Prepare for SQRA by RCF Page 4 of 38 7/7/2015
Revision 1: 15Jul2013 Copyright
How to Prepare For
Schedule Quantitative
Risk Analysis (SQRA)
Sorry, the article you are looking was removed.
You will find a more detailed discussion about the subject
and many other related topics in the paperback edition of
the book "Risk-based Management in the World of Threats
and Opportunities: A Project Controls Perspective." It is
also available in Amazon’s Kindle edition.
Please follow the hyperlink below or copy and paste the
URL on your browser to check. You can now grab a copy.
Check it out!
• http://www.amazon.com/RUFRAN-C.-FRAGO-PMI-
RMP/e/B01055MPYI
• http://www.amazon.com/dp/B0104OFUDI/ref=rdr_ki
ndle_ext_tmb
• https://www.linkedin.com/pulse/risk-based-
management-world-threats-opportunities-
rufran?trk=prof-post
Cheers,
Rufran C. Frago
Author
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