1. Problem Recognition, Definition and Evaluation
Our company will install Ultrasonic Gas Metering Station for our project. Is the use of OmniClass can be applied to this project?
This blog is made to revise the W5.2 blog post before.
2. Development of the Feasible Alternatives
OmniClass 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.
Fig 1. Inter-related OmniClass
Author will be chosen what kind of tables on OmniClass that applicable for Gas Metering Project WBS.
3. Development of the Outcomes for Each Alternative
To choose top four most applicable tables from the 15 tables, the most appropriate technique will be the multi attributes approach. Compensatory models, the additive weighting technique has been chosen to help performing the comparison and selection. In all compensatory models, which involve a single dimension, the values of all attributes must be converted to a common measureable scale. By using determined criteria related to the Gas Metering Project, the additive weighting technique will rank the 15 tables, shows high to low applicability and relevance to the project.
4. Selection of a Criterion
There are six criteria related to gas metering project that have been determined for the OmniClass tables selection:
- WBS location that related to Gas Metering Project (1-3, 3 being highest relationship)
- WBS deliverables related to Gas Metering Project (1-3, 3 being highest relationship)
- WBS activity related to Gas Metering Project (1-3, 3 being highest relationship)
- WBS organization that related to Gas Metering Project (1-3, 3 being highest relationship)
- WBS level detail completeness (1-4, 4 being preferable)
- Tables applicability/uses for oil & gas project (low to high)
5. Analysis and Comparison of the Alternatives
The comparison result of OmniClass Tables is shown in the following table:
Table 1. OmniClass Tables Comparison Based on Six Selection Criteria
All attributes in table 1, be ranked in order of importance by doing paired comparison between each possible attribute combination. Result as shown on table 2:
Table 2. Ordinal Ranking of OmniClass Tables attributes
Based on Table 2, relative rank = ordinal rank + 1. A rank of 5 is best, the relative ranking will become as follows:
Table 3. OmniClass Tables Selection – Attribute Weight
The attributes values on Table 1 have to be converted in to non-dimensional form. The procedure for converting the original data on table 1 for a particular attribute to its dimensionless rating is:
The non-dimensional (dimensionless) values of the attributes are shown on Table 4:
Table 4. OmniClass Tables Selection – Dimensionless Value
Finally, for each OmniClass table, the normalized weight of the attribute (Table 3) is multiplied the non-dimensional attribute value (Table 4) to obtain a weighted score for the attribute. These weighted score are then summed to arrive at an overall score for each OmniClass table. The result is shown on Table 5.
Table 5. OmniClass Tables Selection – Weighted Score
6. Selection of the Preferred Alternative
Based on calculation and Table 5 comparison, the top three most applicable and relevant WBS from OmniClass for the Gas Metering Project is:
- Table 14-Spaces by Form (score 0.310)
- Table 23-Products (score 0.357)
- Table 31-Phases (score 0.270)
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.
- Planning Planet (2017). Creating Work Breakdown Structure. Retrieved from http://www.planningplanet.com/guild/gpccar/creating-work-breakdown-structure
- Hendarto, Tommy. (2017). W6.1_TH_Standardized WBS Structures for Gas Station Project-Part 3. Retrieved from http://emeraldaace2017.com/2017/09/22/w6-1_th_-standardized-wbs-structures-for-gas-station-project-part-3/
- OmniClass (2017), OmniClass Table 21 – Elements (includes design elements). Retrieved from www.omniclass.org/tables/OmniClass_21_2012-05-16.zip
- Gannasonggo, Gustaf. (2012). W3_GGS_OmniClass WBS|Casablanca AACE 2012. Retrieved from https://aacecasablanca.wordpress.com/2012/02/06/w3_ggs_omniclass-wbs-table-selection-using-additive-weighting-technique/