Set the standard. Train to the standard. Certify to the standard. Plan the work to the standard. Execute to the plan and the standard. Check against the standard. Make prioritized improvements to the standard, training, planning, and execution.
Early identification of changes and conflicts is the first key to success. The capability to identify changes and conflicts early in the process is a combination of organizational structure, systems, management, training, and coaching.
Specialty contractors are continually faced with costly impacts to their labor productivity with many beyond their direct control. The best Project Managers know how continually expand their influence.
An improvement of a few minutes per day to actual installation time compounded monthly is worth about $800K per year for a $25M contractor. What is it worth to you? Improvements to field productivity can be viewed as 4 major stages of a pyramid