From The Fabricator’s Signal | Issue 2
The capacity question most estimates cannot answer.
By Rick Phelps, Principal, Synchronous Solutions
In the last issue, I wrote that an AI platform built for this industry can already answer something like 40,000 questions about a fabrication shop’s operations.
The real bottleneck is not whether AI can answer the questions. It is whether you know which questions actually matter.
Here is one of them:
Will this job actually be profitable?
When Busy Doesn’t Produce the Expected Profit
Most fabrication owners do not need another report to tell them the shop is busy. They can see and feel it.
Overtime climbs. Production becomes chaotic. Jobs require constant expediting. Install dates become harder to protect. Rushed work contributes to mistakes and callbacks. Everyone is working hard, but the expected profit still does not appear.
This is especially frustrating when the individual jobs looked profitable when they were estimated and sold.
The estimate showed an acceptable price and a healthy margin. What it did not show was how much of the shop’s most limited capacity the job would consume.
That missing information can change the economics of the entire order.
One of our clients won an OEM contract to manufacture round tabletops. Sales believed they had found a real winner. The price and projected margin looked attractive.
Then the order entered production.
Every top had to be processed through the waterjet. That resource quickly became the bottleneck for the entire shop. The large order created congestion, disrupted other work, and consumed capacity that could have been used to produce more valuable jobs.
The sales team had not made a careless decision. They made the best decision they could with the information available.
Price and margin were visible. The effect on the shop’s limited capacity was not.
The Missing Variable in Job Profitability
Every dollar of Operating Expense must ultimately be paid for by the Throughput, or $T, generated by the business.
In Synchronous Flow, Throughput is the money remaining from a sale after paying the expenses that vary directly with that sale, primarily material. That Throughput must cover payroll, equipment, facilities, software, vehicles, and the rest of the company’s Operating Expense before the business produces Net Profit.
One resource sets the ceiling on how much Throughput the shop can generate. We call it the Design Constraint.
Depending on the shop and its work mix, the Design Constraint might be a saw, waterjet, CNC router, fabrication bench, or another limited resource.
This means a job cannot be evaluated by price and gross margin alone. You also need to understand how much of the shop’s most limited capacity it will consume.
A job that generates $5,000 of Throughput while consuming 100 constraint minutes is economically different from one that generates the same $5,000 while consuming 500 constraint minutes. The conventional margin may look identical, but one job allows the shop to generate Throughput five times faster than the other.
That difference affects far more than the profitability of one order. It affects overtime, lead times, delivery performance, pricing flexibility, and how much total profit the shop can produce.
What Octane Reveals During Estimating
We call the rate at which a job generates Throughput from the Design Constraint Octane.
Octane = Throughput ÷ Design Constraint minutes
Octane answers a question most estimating systems cannot:
How effectively will this job convert our most limited capacity into Throughput?
This gives sales and ownership a better way to evaluate prospective work.
A complicated job with extensive mitering, curved cutting, or other constraint-intensive features may still be good work. It simply needs to be priced with a clear understanding of the scarce capacity it will consume.
Conversely, a job that flows easily through the Design Constraint may allow the shop to price more competitively while still generating Throughput at an attractive rate.
The objective is not to charge every customer more. It is to understand where the business has room to compete and where an apparently attractive price could create problems throughout the operation.
From Octane to Profitability Index
A few years ago, we added another measurement called the Profitability Index, or PI.
PI compares the anticipated Octane of a prospective job with the rate of Throughput the Design Constraint must generate for the business to achieve its financial objective.
A PI of 1.00 means the job would generate Throughput from constrained capacity at the rate required for the business to break even.
A PI above 1.00 generates Throughput at a rate above the break-even requirement. A PI below 1.00 consumes capacity at a rate below that requirement.
PI is not traditional job costing, nor does it suggest that an individual job has its own Net Profit. Net Profit belongs to the business as a whole. PI measures how effectively a job uses the resource that limits the company’s ability to generate that profit.
A low-PI estimate does not automatically represent work the shop should reject. The business may have available capacity, a strategic customer relationship, or another valid reason to accept it.
The important difference is that the decision becomes deliberate.
Ownership can choose to adjust the price, modify the scope, reconsider the timing, accept the work strategically, or decline it. That is far better than discovering the job’s effect through overtime, congestion, late deliveries, and disappointing financial results after it has already entered production.
A Useful Number Starts With the Right Management Logic
Calculating PI is not simply a matter of adding another field to an estimate.
Before the number can guide decisions, a fabrication business must answer several important questions:
- What resource truly limits the flow of work through our operation?
- How much usable capacity does that resource provide?
- How much Throughput must it generate to cover our Operating Expense and profit objective?
- Which job characteristics consume its time?
- How should estimating and sales respond when prospective work falls above or below the required rate?
- How will we compare the estimate with what actually happened in production?
This is the management system Synchronous Solutions helps fabricators build through Synchronous Flow.
We help the company identify its Design Constraint, establish the required Throughput rate, develop practical estimating and pricing guardrails, and create the feedback loop between the estimate and actual production performance.
The objective is not merely to produce another number. It is to make that number useful in the daily decisions that determine whether the shop remains in control and achieves its financial goals.
When those decisions improve, the benefits extend across the business. The shop can reduce unnecessary overtime and expediting, protect delivery commitments, provide more dependable service, and price work with a clearer understanding of where it has a genuine competitive advantage.
Technology Makes the Method Scalable
Once the management logic has been established, technology can make it faster and easier to apply.
StoneApp has already incorporated Synchronous Flow measurements into its software and can estimate Octane and PI during the estimating process. This gives sales better information before the customer’s quote is finalized.
We are also working with Thryve to explore how AI can process information from estimates, drawings, and slab layouts to anticipate the Design Constraint minutes a job is likely to consume.
The aim is to give sales visibility into PI while there is still time to make a better decision, before the quote is presented and before a slab is touched.
These tools represent an important step forward, but the technology is not the management system. Software can calculate and display the result. The business must still identify the right constraint, establish the correct target, and determine how that information should guide decisions.
Without that foundation, a faster calculation is simply another number on another screen.
Where This Goes Next
The next step is to compare the estimated constraint time with the time each job actually consumes.
Estimate. Execute. Measure. Learn.
Repeated across enough jobs, this feedback can improve estimating accuracy, pricing, sales strategy, capacity planning, and the profitability of the overall business.
The result is not simply a shop that knows more about its jobs. It is a shop with greater order and control, more dependable delivery, better service, lower avoidable costs, and a clearer understanding of how to compete.
AI can help calculate the answer faster.
Synchronous Flow determines which question matters, how the answer should be interpreted, and what the business should do with it.
Rick Phelps
Synchronous Solutions
