W5.1_MFO_ OmniClass and 3D WBS on Gas Metering System Installation

1.      Problem Recognition, Definition and Evaluation

A company will install Ultrasonic Gas Metering Station for our project. Is the use of OmniClass 3D WBS can be applied to this project?

2.      Development of the Feasible Alternatives

OmniClass is a means of organizing and retrieving information specifically designed for the construction industry. It consists of 15 hierarchical tables, each of which represents a different facet of construction information or entries on it can be combined with entries on other tables to classify more complex subjects. (OmniClass, 2014)

3D WBS is based on three main dimensions: Zones Breakdown Structure (ZBS), Products Breakdown Structure (PBS) and Activity Breakdown Structure (ABS).

Fig 1. 3D WBS

3.      Development of the Outcomes for Each Alternative

The 15 inter-related OmniClass tables are: (OmniClass, 2014)

  1. Table 11    : Construction Entities by Function
  2. Table 12    : Construction Entities by Form
  3. Table 13    : Spaces by Function
  4. Table 14    : Spaces by Form
  5. Table 21    : Elements (includes Designed Elements)
  6. Table 22    : Work Results
  7. Table 23    : Products
  8. Table 31    : Phases
  9. Table 32    : Services
  10. Table 33    : Disciplines
  11. Table 34    : Organizational Roles
  12. Table 35    : Tools
  13. Table 36    : Information
  14. Table 41    : Materials
  15. Table 49    : Properties

The tables above can be described in terms of the 3D WBS models as follows:

Fig 2. 3D WBS Cubes and Omniclass Table

4.      Selection of a Criterion

Characteristics of the WBS:

  1. WBS defines output
  2. WBS is hierarchical
  3. One WBS level’s output is an input to the next higher level.

5.      Analysis and Comparison of the Alternatives

By using Omniclass tables as reference, 3D WBS for the project is as follow:

    1. Zone Breakdown Structure (ZBS)
    2. Product Breakdown Structure (PBS)

3. Activity Breakdown Structure (ABS)

Based on the above, it appears that OmniClass and 3D WBS are compatible.

6.      Selection of the Preferred Alternative

OmniClass tables give a more detailed WBS and can be applied to this gas metering system installation project.

7.      Performance Monitoring and Post Evaluation of Results

Monitoring and supervision should be conducted strictly during project to keep the project inline with the WBS.


  1. Humpreys, G. C. (2011). Project Management Using Earned Value (2nd ed.). Humpreys & Associates, Inc.
  2. W16_GW_OmniClass and 3D WBS on Pipeline Installation. (2014, June 15). Retrieved from Kristal AACE 2014 : https://kristalaace2014.wordpress.com/2014/06/15/w16_gw_omniclass-and-3d-wbs-on-pipeline-installation/
  3. OmniClass. (2017). Retrieved from OmniClass: http://www.omniclass.org/
  4. Syafri, F. (2013, October 8). Managing Small Project: Omniclass 3D WBS. Retrieved from Simatupang AACE 2014: http://simatupangaace2014.wordpress.com/2013/10/08/w6_afs_-managing-small-project-omniclass-3d-wbs-2/
  1. Moine J-Y. 2013.3D Work Breakdown Structure Method, PM Word Journal Vol. II, Issue IV–April 2013

2 thoughts on “W5.1_MFO_ OmniClass and 3D WBS on Gas Metering System Installation”

  1. Sorry Pak Fakhri, but you have two fatal flaws still remaining:
    1) Your “selection criteria” won’t help you DIFFERENTIATE one from the other. In other words, all 15 tables “define output”, are hierarchical and one level’s output is an input to the next higher level. (Vertical and Horizontal Integration) That means you need to select some attributes that are going to enable you to select from the 15 tables which top 2 or 3 are “appropriate”

    2) Under Step 5, there needs to be some kind of SCORING MODEL (i.e. Multi-attribute decision making, SWOT, Force Field) where you compare the 15 tables against your selection criteria.

    You’ve picked a really great topic but what you are trying to do is make a decision and then back into the decision. That is NOT a good practice at all. What you need to do is establish the criteria, then conduct an IMPARTIAL and UNBIASED analysis and THEN make your recommendations from that analysis. (Hint, I seriously doubt that Table 14 is going to do ANYTHING to help you out) Keeping in mind that Moines is only SUGGESTING those three options and that there are many other combinations and permutations, I would suggest you FORGET ZONE entirely. AREA or LOCATION may be relevant? Phases may work? But you need to analyze ALL of them against the attributes you’ve identified.

    Couple of additional references that give you a better idea of what I am suggesting you create:



    You are almost there……. It should only take you about 45 minutes to fix what is wrong with your approach and get the 5 stars you deserve, provided you set it up. Be sure to repost as W5.2……

    Dr. PDG Jakarta

  2. Thank’s for the comment Dr Paul but Sorry Dr Paul, i still don’t understand why i must make the scoring model. Actually, the blog post that I created similar with some references that you give like :





    Maybe i have mistake in “the selection of criteria” and “ZONE”. Is it ok if i only revise “the selection of criteria” and “ZONE” become AREA or LOCATION?


Leave a Reply

Your email address will not be published. Required fields are marked *