Thursday, November 29, 2012

W4_Ocharlie_Compare OmniClass WBS as EVM tool


Problem definition

Compare WBS options in OmniClass as earned value management tools

Feasible alternatives

WBS with discipline orientation

WBS with phase orientation

WBS with component orientation

Develop the outcome of each alternative

Table 1 Rating of the alternatives against WBS attributes

ATTRIBUTES
WBS BY DISCIPLINE
WBS BY PHASE
WBS BY COMPONENT
Product visibility
Poor
Excellent
Fair
Bases for historical data
Good
good
Good
Costs estimates
Good
Good
Good
Includes all work element
Poor
Excellent
Good

 

Selection of criteria

Product Visibility

Cost estimates

Inclusive of all work elements

Bases for historical data

Analysis of alternatives

Table 2 To check for dominance using the Noncompensatory model

ATTRIBUTES
 DISCIPLINE VS PHASE
 PHASE VS COMPONENT
COMPONENT VS DISCIPLINE
Product visibility
Worse
Better
Better
Bases for historical data
Worse
Better
Equal
Costs estimates
Worse
Equal
Equal
Includes all work element
Worse
Equal
Better
Dominance
Yes
Yes
Yes

 

From the pairwise comparisons of the 3 WBS orientations, Phase dominates discipline, phase dominates component and component dominates discipline. With phase orientation dominating it is clear that Phase oriented WBS gives much visibility as EVM tool.

Table 3 Comparison using the Nondimensional scaling of Compensatory model

ATTRIBUTES
 DISCIPLINE
 PHASE
COMPONENT
Product visibility
0
1
0.4
Bases for historical data
1
1
1
Costs estimates
1
1
1
Includes all work element
.3
1
1
 
2.3
4
3.4

Taking all the attributes to be of equal importance, the scores for each WBS is the summation of the nondimensional values of each column. Predictably phase WBS is best rated.

 

Selection of preferred alternative

Earned Value Measurement is a project control tool that focuses on earned value of work performed as project progresses and allows for effective measurement of the status in terms of both cost and schedule. Product visibility is a key characteristic of WBS and an effective EVM tool for progress measurement. From the two analysis presented, phase oriented WBS gives a visible status of the project in terms of milestone completion.

Performance monitoring and evaluation

The phase oriented WBS, the phase 2 which is fabrication can be taken down to level 3 to the main elements of product oriented WBS –skid and spools fabrication - and progress tracked both in terms of schedule and cost.

References

OmniClass a strategy for classifying the built environment (Ed 1), 2006-03-28 Release).

OmniClass Table 23- Product

OmniClass Table 31- Phases

OmniClass Table 33- Discipline

Retrieved from http:www.omniclass.org/

Hollman, J.K . (Ed). (2012). , Plan Project Scope and Execution Strategy development,

Total Cost Management Framework. (PP. 147-150) WV, AACE International

 Sullivan, W.G., Wicks, E.M., & Koelling, C.P. (2012). Engineering Economy (15th ed.) New Jersey, NJ. Pearson Higher Education, Inc.

 

 

1 comment:

  1. AWESOME, Charles!!! Nice work!!! Good job on your citations as well..... (It would have been better if you listed the actual chapters/pages you referenced from Engineering Economy)

    Follow on question that might be a good topic for another blog posting-

    "Do you think that all stakeholders want to see the project by phase"?

    Or maybe better asked another way, "Given NORSOK Z-014 offers 3 different sorts and Omniclass offers 15, which stakeholders would be interested in each of these views or sorts?"

    This is a really GREAT topic and one of growing importance and relevance in the world of project management.

    Keep up the good work and looking forward to seeing more blog postings on this topic.

    BR,
    Dr. PDG, back in Jakarta

    ReplyDelete