Case Study: Gustavo Preston Company achieves faster invoicing — cuts invoice time from days to hours with Western Computer

Automated Field Service Processes Accelerate Cash Flow

Gustavo Preston Company, a 130+ year‑old commercial pump repair and sales agency serving Boston and New England, was growing rapidly but struggled with manual field‑service workflows after deploying Microsoft Dynamics NAV. Technicians had to return to the office to pick up and submit work orders, which slowed response times and delayed invoicing. Gustavo Preston engaged Western Computer for Dynamics NAV service‑management expertise and recommendations for mobile and scheduling tools (MobileNAV and PlannerOne).

Western Computer implemented the Dynamics NAV Service Management module with MobileNAV for mobile data capture and PlannerOne for optimized scheduling, eliminating technician trips to the office and automating work‑order processing. The changes cut technician admin time by about 30 minutes per day (more than 25 hours per week across 11 techs), saved internal staff roughly 45 minutes to 1–2 hours per day reconciling orders, and reduced invoice turnaround from as many as five days to as fast as two hours—accelerating cash flow and improving service responsiveness.

Gustavo Preston Company

Randy Peterman

Project Manager