2.5 Interface Dissonances Between Construction And Commissioning

2.4 Problems during Commissioning Process

Glitches may occur in almost everything that we do because nothing is perfect. Flow chart below summarizes problems that might occur during commissioning process;

Figure 2.3: Problems during Commissioning Process
Source: Grondzik, W. T. (2009). Principles of building commissioning. Hoboken, New Jersey: John Wiley & Sons, Inc., page 5
2.5 Interface Dissonances between Construction and Commissioning

Commissioning identifies deficiencies in buildings by improving design and construction in new building or “tuning” the existing system (Mills, 2011). It can be proven that commissioning helps maximize performance of targeted energy efficiency measures and save energy to utilize energy efficiencies
The most severe causes would be violating conditions of contract under the category inadequate contract and specifications. It had been detected that some contractors used substandard construction materials which could make the owner took the action to change his bid after submission to the general contractor. That would make the project to be complicated since some changes need to be done. Quality control is needed to ensure no substandard materials or any violations of the contract repeated. Second and third most severe causes of interface problems would be the owner’s low budget and late payment of construction progress by owner to the construction parties. This is somehow an unpredictable case yet it is not acceptable by many parties because it can cause conflicts between the construction parties. Owner’s low budget and late payment to construction parties will affect financial plan, may cause inadequate labor payroll and projects or jobs would not be completed by construction parties. Next, the fourth cause would be poor quality of work assemblies. After general contractor accepted construction contract, he may award part or most of the contract to subcontractor(s). When the
This is surely an unexpected case and it could lead to construction project delay and low quality of work. When geological problems arise on site, some changes should be done such as change in design, equipment used, and foundation design and excavation plans are required. Figure 2.3 below summarizes the most important causes of inconsistencies between design and construction;

Figure 2.4: The Most Important Causes of Inconsistencies between Design and Construction
Source: Arain, F. M., Pheng, L. S., & Assaf, S. A. (2006). Contractors’ Views of the Potential Causes of Inconsistencies between Design and Construction in Saudi Arabia, Journal of Performance Constructed Facilities., 20:1(74), page 81 2.6