Improvement Model for the Proposal Accuracy of Security System Design at Industrial Facilities

Abstract

The research develops an improvement model for industrial preliminary security system design (PSSD) projects at an engineering design company (EDC). The improvement model’s aim is to increase the accuracy of preliminary design Material Take-Off (MTOs) lists to reduce their non-compliance rate by clients in comparison to as-built design MTOs. The EDC’s design requirements allow an estimation error range of ±15% between preliminary design quantities and final as-built material quantities and equipment types/specifications. Also known as bills of quantity, the MTOs of PSSD projects at the EDC are investigated because their preliminary design error (PDE) rates exceed the 15% acceptable error margin that factor into a lower overall quality performance score. The study analyzes the entire population of noncompliant (NC) PSSD projects at the EDC consisting of 13 projects. The improvement model comprises of the procedural application of seven developed solutions during preliminary engineering design to mitigate critical errors identified from analyzed non-compliant PSSD projects. The application of solutions reduces the quantities of NC PSSD projects from thirteen to eight across all security project classifications. This indicates a 38.46% reduction in NC PSSD projects.

Keywords

• Bill of Quantity Error
• Engineering Design
• Industrial Security Systems
• Material Take-off Errors