How ENG Reduced Process Piping Spooling Time by 40% on a Semiconductor Fab Project 

VDC improves process piping spooling efficiency by standardizing fabrication-ready deliverables, tracking spool drawings through quality control and approvals, and maintaining clear release records. On a semiconductor fab project, ENG combined these practices with project-specific automation to reduce spooling time by 40% while improving production schedule visibility. 

On one of the world’s largest semiconductor manufacturing fab projects, design and fabrication had to happen simultaneously. P&IDs kept changing, four fabrication shops worked to different standards, and the client needed its shops running. ENG built a traceable VDC workflow that tracked every spool drawing from the model to client approval. By combining three different workflows and implementing a custom add-in, ENG cut spooling time by 40% and extended saving time in the production process.  

Project Snapshot: Semiconductor Fab Process Piping 

Project type	Semiconductor fab, process piping
ENG scope	Process-piping mains and pipe racks: modeling, MEP coordination, spool drawings
Duration	2 years (ongoing)
Team	16 ENG modelers
Piping modeled	About 130,000 LF
Spool packages delivered	900+
Fabrication shops	4 vendors
Platform	Revit, ClickUp, BIM360 and ACC

ENG has also delivered remote electrical prefabrication for a semiconductor fab in Arizona for a 2.4 million sq ft. 

The Challenge: Spooling While the Design Kept Changing 

In a conventional project sequence, teams design, model, coordinate, and only then release the work for fabrication. This semiconductor project gave ENG no such luxury. The client needed its shops running, because shop capacity costs real money, so the team coordinated and fabricated at the same time. 

The four vendors did not work alike. Tolerances, stock, and methods differed from shop to shop, even for the same material. Meanwhile, the design never settled. The team started with P&IDs that looked final, then went past revision 13 as changes kept coming. Midway through, the general contractor changed, and a Revit upgrade made the transition harder. 

Supply disruption added another layer. Although the valves had been approved, the specified models were unavailable. At one point, the team tracked two or three different valve models and brands for the same service. Any one of these problems is manageable. Together, over two years, they called for a different approach. 

Three Lessons That Kept Spool Drawings Moving to the Shops 

ENG couldn’t stop upstream changes, so it focused on how the team responded. Three lessons shaped that response.

Lesson 1: Redefine “Done” as a Fabrication-Ready Spool 

Build a process before you build pipe. 

ENG redefined what a finished deliverable meant. A clean, clash-free model had been the standard. On this project, the team prioritized fabrication-ready BIM to support spool production at the shop.  

ENG also aligned its MEP coordination process with the GC’s. Each package sent to the shop included a report confirming it was clash-free in the model at the time of release. Changes kept arriving, but ENG now had a date, status, and proof, which gave it something to negotiate with. 

Lesson 2: Track Every Spool from Model to Client Approval 

Make every decision traceable. 

With this much in motion, nobody could rely on memory or an inbox. ENG assigned each spool a single ID and used it to carry the work from scheduling through QC to client verification, all backed by one source of truth. 

The software was only part of the answer. Daily meetings and the habit of knowing exactly who to go to made the tools worth using. 

Lesson 3: Write One SOP Every Modeler Can Build From 

Standardize people, not just drawings. 

ENG wrote its standards into a Standard Operating Procedure (SOP) with graphical guides and training. Anyone could build a full package from that single document, so nothing lived in one person’s head. 

The SOP proved its value as people rotated on and off the project. Newcomers got up to speed without a drop in quality, and the standards held when the GC changed, so ENG did not have to start over. 

Results of the VDC Workflow 

ENG pulled these figures directly from the project’s tracking data, not a survey or an after-the-fact estimate. 

Watch the Process-Piping VDC Webinar 

How do you keep spool drawings moving when P&IDs continue changing, and fabrication shops are already working? 

In this webinar, Gloria Luna, Director of Mechanical & Plumbing VDC, and Natalí Britos, BIM Project Manager, explain how ENG managed coordination, spool tracking, and standardized deliverables on a major semiconductor fab project.