W5_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_MFO_ OmniClass and 3D WBS on Gas Metering System Installation”

  1. Sorry Pak Fakhri but I am going to ask that you do this over again….. Why? First of all Jean Yves (who I am co-authoring a book with on this topic) is not saying that the ONLY combination is Zone, Activity and Product. That is one of any number of possible combinations.

    What I am expecting you to do would be to take the 15 Omniclass Tables (Feasible Alternatives) and then create some kind of SCORING MODEL (Multi-Attribute perhaps?) that determine which 3 tables out of the 15 options would work best for YOUR SPECIFIC project?

    And your SELECTION CRITERIA is going to be the top 3 highest scoring models out of the 15 feasible alternatives.

    Bottom line- you’ve picked a really great topic but you need to develop it more FIRST and once you have shown us which are the top 3 tables that are FIT FOR YOUR SPECIFIC PURPOSE, then you can go on to show us how you plan to use them to minimize change orders or produce better cost estimates or CPM schedules.

    Dr. PDG, Jakarta

  2. PS Pak Fakhri, just a suggestion but when you show the tables, why not roll them up to Level 1 (the yellow rows) just for illustration purposes? Showing the full tables is way too much information at least at this point.

    Once you have picked your top 3 tables, THEN you can start to show examples in greater detail. But for now, make your postings much easier to understand by showing only the Level 1 options for the 3 you end up selecting.

    Does this make sense to you? Does this help you move forward?

    Dr. PDG, Jakarta


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