W7_Ocharlie_Workflow

Problem definition

Fabrication yard operations involve large outlay of resources. With orders coming in daily, management of these resources to reduce costs becomes tasking. How do we minimise cost by optimizing throughput.

 Feasible alternatives

The Project work breakdown structure presents uni-direction orientation to projects.

3D work breakdown structure presents multi-dimension view to projects 

Develop the outcome of each alternative

The project work breakdown structure can be product oriented, discipline oriented, or organisation oriented. This presents a single orientation to projects. Shown in W2_Ocharlie_WBS blog posting.. 

The 3D WBS presents multi-dimensional view to projects thus providing complete view of the project.

 Selection of criteria

OMNICLASS presents 15 tables which completely defines construction information.

A WBS matrix should therefore completely define the project

Jean-Yves Moine developed a theory which classifies WBS in 3D model fig.1;

fig. 1 3D WBS

 

Jean-Yves opines that activity (ABS) yields products (PBS) and is done somewhere (GBS). 

He developed the equation

WBS = GBS x PBS x ABS

WBS is a crossing between the 3 breakdown structures. 

Inside the WBS cube are little cubes which are one time schedule tasks. These little cubes are controlled by the resources (tools), discipline (trade) and their properties,

Analysis of alternatives

Single dimensional WBS

Activity Breakdown structure             Work Breakdown Structure		Project Management	Equipment mobilization	Procurement	Fabrication	Inspection & testing	Load out
Structural skid		1	2	6	11	11	16
	Skid frame	1	2	6	11	11	16
	Hand rails	1	2	6	11	11	16
	Drain pan	1	2	6	11	11	16
	Grating	1	2	6	11	11	16
	Blasting and painting	1	3	7	12	12	16
Piping spools		1	2	8	13	13	16
	Pipe spools	1	2	8	13	13	16
	Pipe supports	1	2	8	13	13	16
	Hydrotest	1	4	9	14	14	16
	Blasting and Painting	1	3	7	12	12	16
Onskid installation		1	5	10		15	16
	Pipe supports	1	5	10		15	16
	Piping	1	5	10		15	16
	Equipment	1	5	10		15	16
	Instrumentation	1	5	10		15	16

 

Table 1 WBS matrix for a Retrofit project showing the WBS components and WP numbers.        

  

Resources			Activity Breakdown               Product Breakdown		Project Management	Equipment Mobilization	Procurement	Fabrication	Inspection & Testing	Load out & Sjipping
Material	Trade	Tools
11.1	11.2	11.3	Structural skid		1	2	6	11	11	17
11.11	11.21	11.31		Skid frame	1	2	6	11	11	17
11.12	11.22	11.32		Hand rails	1	2	6	11	11	17
11.13	11.23	11.33		Drain pan	1	2	6	11	11	17
11.14	11.24	11.34		Grating	1	2	6	11	11	17
12.1	12.2	12.3		Blasting and painting	1	3	7	12	12	17
13.1	13.2	13.3	Piping spools		1	2	8	13	13	17
13.11	13.21	13.31		Pipe spools	1	2	8	13	13	17
13.12	13.22	13.32		Pipe supports	1	2	8	13	13	17
14.1	14.2	14.3		Hydrotest	1	4	9	14	14	17
12.1	12.2	12.3		Blasting and Painting	1	3	7	12	12	17
16.1	16.2	16.3	Onskid installation		1	5	10	15	16	17
16.1	16.2	16.3		Pipe supports	1	5	10	15	16	17
16.1	16.2	16.3		Piping	1	5	10	15	16	17
16.1	16.2	16.3		Equipment	1	5	10	15	16	17
16.1	16.2	16.3		Instrumentation	1	5	10	15	16	17

 Table 2 Multi dimension WBS matrix for a Retrofit project showing the PBS components and WP numbers and resource requirement

 Selection of preferred alternative

The WBS matrix showing WBS components and activity numbers presents uni-directional view of the project and does not adequately aid scheduling and resource allocation.

The multi-dimension WBS presents the interfaces, and aids scheduling in defining what work has to be done, when it should be done, where it has to be done and by whom and with what resources. With these, baseline estimates are made and the work packages are prioritized by identifying those that are on critical path.

Performance monitoring and evaluation

With the multi dimension approach, scheduling becomes easy and workflow can be managed as jobs are prioritised considering resources, trade and delivery date.    

References

Jean-Yves Moine (2012). 3D WBS model. (online). Available at http:3D-wbs.blogspot.fr {last Accessed 14/12/2012}

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

Retrieved from http:www.omniclass.org/

Humphreys, G. C. (2011). Definition of Scope, Work Breakdown Structure (WBS) and Dictionary, Project Management Using Earned Value (2^nd ed.), (PP. 45-58) CA, Humphreys & Associates Inc.

Humphreys, G. C. (2011). Relating Organisation, Responsibility, and Work Scope, Project Management Using Earned Value (2^nd ed.), (PP. 91-100) CA, Humphreys & Associates Inc.

Hollman, J.K. (Ed}. (2012). ,  Plan Project Scope and Execution Strategy development, Total Cost Management Framework. (PP. 147-150) WV, AACE International