Applying work measurements to identify productivity potentials: the case of prefabricated concrete elements

Abstract

Determining productivity targets based on actual potential for productivity improvement; is essential for fostering continuous improvement. Developing realistic and work specific productivity targets has proven a huge challenge in on-site construction. The present research exemplifies how work measurement techniques can be used to identify improvement potential and develop such targets. Two work measurement techniques; work sampling and continuous time study have been applied during a five day period, where the installation of prefabricated concrete elements have been observed at a single project case. The study revealed high fluctuations in daily utilization and productivity rates; moreover, a strong relationship between direct work and productivity at work task level were identified (R² = .827). Additionally, four managerial strategies for improving productivity were identified: (1) Enhance production start and stops; (2) improve flows; (3) optimize utilization of manning and avoid absenteeism; (4) shield the production from weather. To develop a realistic productivity target, the observed productivity day-curves have been modified, by adjusting for effects of variation and declines in productivity, revealing an improvement potential of 19.4%. The present study demonstrates how realistic productivity targets can be developed to support managers’ and managerial decisions and thus act as a starting point for continuous improvement.

Keywords:

• Work sampling
• continuous time
• productivity targets
• goal setting
• continuous improvement
• construction management

Disclosure statement

No potential conflict of interest was reported by the author(s).

Data availability statement

Data generated or analyzed during the study are available from the corresponding author by reasonable request.