Schedule quality – detailed analysis of the main metrics webinar, 2...

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Schedule Quality
Detailed analysis of the main metrics
Franco Pittoni
Director FP Opera
BIM & Project Controls
franco.pitt...

Introduction to the webinar
 Why is Schedule Quality important?
 Continuation of Schedule Quality presentation
 Intende...

Webinar frame
3
CPM
(Critical Path Method)
Deterministic
Critical Chain
Last Planner
Risk Analysis
Rolling wave
Planning

Schedule Quality definition
A definition of a Schedule Quality could be:
 It provides all the main elements of informatio...

SQ Metrics Sets
 The Acumen Fuse “Schedule Quality” index
 The DCMA 14 Point assessment
 NASA Health Check
 GAO (Gover...

SQ Metrics Sets – cont’d
 NASA Health Check:
 Schedule Status
 Task and Milestone Count
 Integrity Indicators
 Constr...

Confusion and desperation!
7

Selected metrics sets
8
DCMA 14 Point Assessment Acumen Fuse
1. Logic 1. Missing Logic
2. Leads 2. Logic Density™
3. Lags ...

Something in common!
9
DCMA 14 Point Assessment Acumen Fuse
1. Logic 1. Missing Logic
2. Leads 2. Logic Density™
3. Lags 3...

Only 6 metrics….much better!
10
DCMA 14 Point Assessment Acumen Fuse
1. Logic 1. Missing Logic
2. Leads 4. Hard Constraint...

Similar ….not identical
11

Main differences
 Applicability
– Fuse metrics apply to ALL activities
– DCMA 14PA metrics apply to TOTAL activities
12
I...

Main differences – cont’d
 Thresholds
 Example: number of Leads (aka negative Lags)
– Fuse suggests that some improvemen...

Main Differences – cont’d
 Example: high duration – insufficient detail
– Fuse : < 5% of activities with duration longer ...

Main Differences – cont’d
Example: 4 year duration – 600 activities
15
Year 1 Year 2 Year 3 Year 4
Fuse
5% of 600 = 30 act...

The essential elements of a Schedule
16
 Activities (all types)
 Dependencies (FS-SS-FF-SF)
 Lags and Leads
 Constrain...

Dependencies
17
 This metric addresses two aspects:
 Their existence (Open Ends, Open Start or Finish)
Fuse & DCMA thres...

Logically correct schedule (no open ends)
18

Apparently incorrect schedule
19
Project B
Project A
Project C

Open Start
20
FF + 10 days
10 days
FF + 10 days
10 days
Data Date

Open Finish
21
SS + 10 days
10 days
Project Finish
SS + 10 days
10 days

Dependencies types (FS-SS-FF-SF)
22
 Still a widely debated topic
 Closely related to the use of Lags and Leads
 Many c...

Dependencies types (FS-SS-FF-SF)
23
Dependency
type
Activity type Positive Lag
Negative Lag
(Lead)
FS Normal X X
Start Mil...

Some examples of improper use of
dependencies and Lags-Leads
24
Lag
Sometime used to delay the
Start of the successor
Some...

Constraints
25
Mrs. CPM Mr. Constraint
Mr. C. attempts to prevent the schedule from being
logic-driven.

Hard Constraints
26
Mandatory
Finish

Soft Constraints
27
Finish On

Constraints – main differences
28
 Terminology
 Hard
 Soft
 How they work?
 Is the Total Float affected?
 Are the da...

Constraints – terminology
29
Fuse SQ index
Hard-Soft type
H Mandatory Finish
H Mandatory Start
H Must Finish on
H Must Sta...

A real example (P6 sample Project)
30

Impact of 1 broken relationship
31
Item Original
Schedule
Modified
Schedule
Difference
(value and %)
Overall duration 517 ...

Acumen Fuse vs DCMA 14PA scores
32
 Acumen Fuse Index
 DCMA 14PA

A real example (from the real world)
33
 The Fuse and DCMA PA scores:
 Substantial difference in value of the two scorin...

What is really important?
34

Conclusions
35
 Many metrics identify what is missing or what exist
 What exists is not necessarily correct
 The 80-20 ...

Conclusions – cont’d
36
 Universally recognised SQ measurement methodology not
in place
 Each organisation should establ...

Final recommendations
37
 Please contribute to the success of the Projects and
Programmes you are involved in!
 Do not h...

38
Franco Pittoni
franco.pittoni@fpopera.com
07812737559

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