A phase-by-phase guide to semiconductor readiness

Getting a semiconductor fab up and running is not one project. It is six.

In Part 1 of this series, we made the case that the next competitive edge in semiconductors is operational, not technical. Complex projects rarely fail because of poor design or construction. They fail during the transition from construction to operations. A certificate of occupancy proves a fab is complete, but it does not prove the fab is ready to run.

Construction-to-operations not as straightforward as the phrase suggests. In fact, it is a multi-year process; every semiconductor facility moves through the same six phases, each with its own needs, its own risks, and its own definition of success. Every transition is another pressure point where knowledge can reset, accountability can dissolve, and schedules can slip.

Choices made during construction set limits that the fab must contend with for the next 20 years, until it is decommissioned. Mistakes made during fit-out can hide until commissioning finds them, leading to delays and cost overruns. Shortcuts taken during ramp-up can resurface as downtime in high-volume manufacturing, where every unplanned hour can cost millions.

Running underneath all six phases is the workforce squeeze we described in Part 1, now at industry scale: an estimated 67,000 semiconductor jobs are projected to go unfilled by 2030. [5.1][EH5.2]The industry is building faster than it can hire. Who carries knowledge from one phase to the next matters as much as what happens within any single phase.

If Part 1 diagnosed why projects fail in the gaps, this article reviews the demands of each phase, the stakes if something goes wrong, and how decisions made in one phase impact everything that follows.

With input from subject matter experts Neha Dhingra, Vice President, Commercial and Operations Management - Microelectronics and Aaron Schumaker, Director of Operations, National Semiconductor Sales, we show that with the right partner in place from phase one, semiconductor fabs can avoid the enormous costs that come with schedule delays, re-work requirements, and downtime.

Phase 1: Facility construction

The first phase largely focuses on site preparation, base build, and the first vertical steel of a facility that will run for decades. "Operations engagement is relatively low during this stage." says Dhingra.  However, decisions made about the layout, access points, contamination control philosophy, and safety culture, govern operations long after the last crane leaves.

This phase is also where cleanliness starts. Cleanrooms require controlled temperature, humidity, and minimal particle contamination. From day one, construction cleanliness, contamination control, and maintenance standards must be established early. Safety spotters, environmental health and safety support, and access control protect both people and the schedule.

Phase 2: Facility fit-out

In this phase, the skeleton becomes a facility. Critical subfab infrastructure goes in, including gas and chemical systems, power distribution, ultrapure water, wastewater, scrubbers, and house extract. It is the densest, most interdependent trade sequence of the entire build.

It is also where mistakes happen and are not caught in the moment. A misrouted line or a missed quality check usually surfaces as a problem later at commissioning and certification, when trades have already moved on.

“By the time something is running in the field, you might find, say, a valve that needs daily operation but is mounted on a ceiling — impossible to reach regularly. Now you are either working around it or redoing part of the construction,” said Dhingra.

First-pass failures live in the gap between the party doing the work and the party verifying it. Phase 2 fit-out is where that gap opens.

Partners add value here by providing QA/QC support, safety spotters, and protocol discipline inside an active construction environment. ABM's SubFab support teams install, maintain, and safely manage subfab equipment, utilities, and process gases while operating within SEMI and ISO protocols. They stabilize critical support systems before the fab ever runs a wafer.

This phase is where technical trust is established. Very few facility partners can execute safely and cleanly inside a cleanroom that is still under construction.

Phase 3: Equipment install and ramp

Leading-edge tools arrive in this phase. Semiconductors require highly specialized equipment that meets high-precision standards. A single tool’s value can range from $10–20 million up to $400 million, says Dhingra. The costs to install them are also in the multi-millions. This equipment must move from the dock to the fab, be installed, commissioned, and qualified. The stakes are high for getting this process right.

Phase three is also where facility readiness and tool readiness converge or collide. Tool installation, cleanroom qualification, test and balance, and NETA electrical testing all have to land in sequence.

Across all phases, having a partner in place that is not tied to any single piece of equipment smooths and speeds the process. For instance, ABM is certified by National Environmental Balancing Bureau (NEBB) with technicians trained in high-quality commissioning, ventilation testing, adjusting, and balancing. ABM technicians are among only 3,200 International High-Performance Building NEBB-Certified Professionals in the world, with just a few hundred in the US.

NEBB-certified firms, professionals, and technicians uphold the highest standards in building enclosure, cleanroom and fume hood performance testing. Certified experts also conduct sound and vibration measurement, building systems commissioning and processes, technical retro- commissioning of existing buildings, and testing, adjusting, and balancing.

From phase one until now, general construction teams drive the process. In this phase, a specialized partner steps up to handle the ramp-up.

Through WGNSTAR, ABM's fab equipment support teams partner directly with OEMs on tool installation, commissioning, and maintenance, managing logistics, coordinating tool movement, providing certified safety spotters, and ensuring accurate placement for faster installation cycles. Trained, protocol-fluent technicians compress ramp timelines, which makes training itself a commercial advantage. A specialized partner supplies the qualified workforce that field engineers direct. It is ecosystem collaboration, not vendor competition, and fabs that structure it that way ramp faster.

Phase 4: High-volume manufacturing

The semiconductor’s high-volume manufacturing phase is the longest and most valuable phase of the lifecycle. The facility runs continuous operations, preventive maintenance, and workforce management at scale, often for a decade or more.

It is also where the cost of failure is most visible. Unplanned downtime, contamination events, and workforce turnover all land directly on yield. Every second of downtime can translate into millions in lost output (to the tune of $100k an hour).

The partner model matters most here. Managed workforce services shift accountability from filling shifts to delivering results. Self-performing teams augment or replace on-site personnel, with the partner owning everything from recruiting and training to supervising against agreed KPIs. Subfab and utilities operations, predictive maintenance, ongoing training, and OEM support keep the facility running, while connected asset and task platforms like ABM Connect give teams the data to act before problems become downtime.

The results of an integrated facility service model are measurable. ABM programs sustain 99.9% or better uptime. A Silicon Valley manufacturer deployed IFS to maintain production continuity through years of operations. On the cost side, vendor consolidation returned $3 million in savings for one client.

Phase 5: Process and node upgrades

Construction is complete, operations are running smoothly, but the fab is still evolving. Tool movement and upgrades, equipment harvesting, and expansion projects keep the facility competitive all while production continues. The contamination and coordination risks resemble those of phase one construction, except now they exist inside a running fab with no tolerance for disruption.

This is the phase where lifecycle continuity converts directly into integrated facility services. Teams that are already fluent in the site's protocols can make upgrades with no learning curve. Asset history and tracking make tool moves predictable. For instance, ABM's equipment relocation and asset management services coordinate specialty trades and track every asset to accelerate recommissioning after each move.

Bottom line: A partner who has been present since construction does not need to discover the facility. They already know it, and can handle any additional changes the facility needs with minimal disruption.

Phase 6: Decommissioning

Eventually, every fab reaches the final stage of its lifecycle. Decommissioning rarely means full site shutdown. What usually happens is at the tool level: equipment comes out, new equipment goes in. That is routine, says Dhingra. It happens roughly every one to two years depending on product type.

The risk is that the whole fab never goes offline during decommissioning. “Out of 300 tools, you might pull 50–60 and decommission those while the rest keeps running,” said Dhingra. “Over time, a lot of infrastructure gets left in place, which drives up the facility's cost per square foot, not just from active spend, but from what is left behind and unaccounted for.”

Navigating all of it takes a partner with the compliance expertise built in: decontamination to certifiable standards, complete documentation for transport and disposal, the expertise to move tools and equipment worth hundreds of millions of dollars.

One workforce, six phase, better data

The common thread tying each phase of the semiconductor lifecycle together is people. The teams that manage janitorial services, operations and maintenance, specialty systems like hazardous material handling, and tool coordination services are vital to semiconductor facility performance.

Most semiconductor service providers fall into one of two buckets: facilities operators who never touch tools, or tool specialists who leave once startup is complete.

An integrated facility services provider marries both areas of expertise. IFS creates one partner, one operating model, and a single set of KPIs from construction and startup through full-scale operations. This model delivers fewer handoffs, which lead to faster ramp cycles and less execution risk with one point of accountability when something slips.

The industry's 67,000-job gap will not be closed by hiring alone. Semiconductor facilities need a training pipeline: recruiting from outside the industry and upskilling operations teams into upgrade project roles as needs shift.

Right now, however, Dhingra says that most training happens entirely on-site, which creates two problems. First, it limits hiring to people who already have industry knowledge. Second, it pulls experienced technicians off their day-to-day work to train others, even though training is not part of their job description.

An integrated services model changes the approach, removing that training burden and bringing more people into the semiconductor workforce. Traditionally, on-the-job training works in three steps: shadowing a trainer, performing under supervision, then performing independently.

“If we can do the earlier stages off-site, without pulling from operations, new hires arrive already at a baseline proficiency,” said Dhringa. “There is still some equipment-specific training needed, but the ramp-up time drops from 3–8 months down to under a month.”

Plus, when skilled teams move between phases instead of rotating out, knowledge compounds instead of resetting.

One system, not six projects

Specialized, full-lifecycle support from construction through decommissioning helps fabs build faster, ramp sooner, operate safer, and scale with confidence. It answers the pain points fab owners name most often: industry cycles, the skilled labor shortage, the scarcity of large-scale providers with both functional and industry expertise, and the constant risk of impacts to production.

ABM’s semiconductor facility experts can deliver the level of precision, service consistency, and coordination required to stay competitive. See ABM's semiconductor solutions.