An operation running at 100% capacity can look efficient until the plan changes.
An emergency order may arrive while a machine is down or a supplier is already behind. When every person, machine and production hour is committed, absorbing the new problem can mean disrupting work that has already been promised.
At Hammer Haag Steel, we try to prevent that by keeping roughly 25% of our capacity available for emergency work. Some of those projects require a three- or four-week turnaround, sometimes sooner.
I call it the 25% Rule.
Twenty-five percent is the number that works for our operation. Another company may need a different reserve. The broader principle is to decide deliberately how much capacity to leave uncommitted.
A reserve earns its cost when it protects a promise.
For us, that requires enough room to absorb disruption, alternative ways to keep work moving and clear visibility into where resources are committed.
Step 1: Give the Reserve a Job
An open machine or unassigned hours can look inefficient because capacity is built to generate output. Committing every available resource, however, leaves little room to absorb an urgent job or recover from a disruption.
The capacity we preserve has a defined purpose. We use it to handle emergency work, schedule changes, equipment problems and unexpected complications inside custom projects.
A 2025 integrative review in Management Review Quarterly examined 193 studies on organizational slack. The researchers found that both too little and too much available slack can hurt performance, while moderate levels that are strategically deployed can improve performance.
That finding points to an important distinction: protected capacity needs a deployment rule.
Before reserving time, capital, labor or operating capacity, leaders should decide what conditions justify using it. In our environment, the trigger may be an urgent customer request, a production delay or an equipment failure that threatens delivery.
Without that discipline, leaders cannot tell whether a reserve is protecting the operation or simply sitting unused.
Step 2: Find What Can Stop the Commitment
Years ago, some of our plate rolling work depended heavily on extremely experienced operators. We had people with decades of experience who could run the equipment and produce complicated parts.
If one of those operators was out, a job could sit until that person returned.
The equipment might be available and the work already scheduled, yet one dependency could stop the project.
We eventually invested in CNC-controlled plate rolling equipment and trained additional operators. With the right equipment and training, less-experienced operators became capable of producing fairly complex shapes. The newer process also reduced some of the handling, measurements and rework required before.
That experience changed how I count capacity. I count what the operation can actually use.
A machine creates limited flexibility when only one employee can operate it. The same vulnerability appears when a process depends on one approval, one supplier or one person with specialized knowledge.
This extends beyond manufacturing. Any customer commitment becomes more fragile when a critical step has only one path forward.
I now look for the point where a person, machine, operation or supplier could stop the commitment we have made.
Leaders can apply the same test to critical work in their own organizations. Trace the process from beginning to end and identify where a single dependency controls progress. Cross-training, equipment investment, process changes or added capability can create another path before a disruption occurs.
Step 3: Make the Reserve Movable
Our projects can involve thousands of individual pieces moving through engineering, prefabrication, fitting and welding, machining, painting, quality control, assembly, shipping and logistics.
Reserved capacity has limited value if leadership cannot see where work is accumulating or which resources can move safely.
That is why we have invested in project tracking, document control and systems that show materials, production progress and critical milestones. Better information helps us spot constraints earlier and redirect people, equipment or space before a delay spreads further through the project.
The same principle appears in broader resource allocation.
In a July 2026 McKinsey survey of 1,205 executives and managers, respondents who described their organizations as first movers were more than three times as likely as late movers to report reallocating at least 20% of resources from one year to the next.
The useful lesson for leaders is the ability to reallocate with enough information to understand the consequences.
A company can have spare resources on paper and still lack usable flexibility if leadership cannot see current commitments, bottlenecks or the downstream effect of moving them.
Before adding more people, equipment or capital, I would first examine whether the organization understands where its existing resources are constrained and which of them can be redirected without creating another delay.
Protect the Room Before You Need It
As Hammer Haag Steel has grown, I have continued investing in equipment, facilities, people, systems and additional capability. Growth has increased the scale of the operation along with the number of dependencies inside it.
That growth makes reserve capacity more difficult to manage and more valuable when something goes wrong.
The percentage may change as we grow. The discipline behind it should remain: preserve usable capacity, reduce critical dependencies and maintain enough operational visibility to respond before one disruption affects another customer.
Different businesses will apply that discipline in different places. For a manufacturer, the constraint may sit on the production floor. A technology company may find it in engineering capacity, while another organization may need to protect capital or specialized talent.
The percentage is a management choice. The deeper question is how much of the organization leadership is willing to commit before uncertainty arrives.
Leaders cannot schedule uncertainty. They can choose whether the organization still has room to respond when it does.
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About Hammer Haag Steel
Hammer Haag is a family-owned steel fabrication business that was founded in 2011. Since the beginning, Constantin Haag, the Founder and CEO of HHS, has sought to ensure that an ethos of trust, quality and accountability permeates every aspect of the day-to-day operations. With his extensive background in design, engineering and manufacturing in concert with an unparalleled dedication and old-fashioned work ethic, Constantin and his team were able to quickly get Hammer Haag Steel off of the ground and grab their share of the steel fabrication market.
Over the years, the HHS team has grown in lockstep with our capacity to service an ever-expanding list of client needs and while much has changed over the years the goal of Hammer Haag Steel remains the same:
To be the ultimate one-stop shop for all of our client’s component and equipment manufacturing needs.
Read more about Hammer Haag Steel and our upcoming expansion on SubmitPR: https://submitpr.org/press-release/hammer-haag-steel-keeps-next-phase-of-manufacturing-growth-in-pinellas-county
