The Scale and Impact of Production Micro-Stops in Your Company: How to Calculate Losses and Minimize Them?
Learn how to precisely calculate the Total Cost of Downtime (TCD) in your factory and how digital Andon and machine connectivity solutions can transform your hidden losses into measurable productivity gains.
Most managers have already tried to quantify the cost of losses during breakdowns and downtime. The answer is often hidden behind dozens of layers of unallocated overhead and unmeasured opportunity costs. The North American manufacturing industry, and Quebec's industry in particular, faces a chasm where operational inefficiency threatens the sustainability of businesses. Quebec's economy, while resilient, is suffering the consequences of decades of productivity stagnation. Global political instability is hitting companies hard that lack effective tools to precisely calculate and minimize the impact of losses during downtime. We address the subject in our article "Understanding the Difference Between OEE and GOE to Optimize Your Production", but systematic analysis of downtime reveals not only obvious mechanical failures, but also untracked micro-stops and phantom factory losses. Slowly and silently, SME margins are being eroded by this operational fog.
What Is the Nature of the Challenge Facing Manufacturing Companies?
A statistic from a Siemens-organized study indicates that the number of downtime incidents has almost halved since the pandemic era1. Yet their unit cost has exploded. Looking at the data, the average number of monthly downtime events dropped from approximately 42 in 2019 to 25. However, recovery time went from 49 minutes to 81. This increase can be explained by several factors, the main ones being a shortage of skilled labor, the increased complexity of automated systems, the heterogeneity of machine fleets to maintain, and rising delays in the supply chain and spare parts. The cost per minute of downtime varies enormously by industry, ranging from $2,300/minute to $130,000/minute.
In Quebec, our situation is somewhat unique. Although our exports grew by 4.7% in 2024, manufacturing GDP fell by 2.1%. This gap truly reflects a growing loss of productivity. Quebec invests significantly less than our Ontario or U.S. competitors in equipment modernization. This lack of investment makes us particularly vulnerable to downtime and drives up our production costs and profit margins relative to Ontario or American competitors. We address this more thoroughly in our article "Demystifying Industry 4.0: How to Connect Your Equipment Fleet Profitably", but this is precisely where solutions like Artemis Intelligence become highly compelling — modernizing your heterogeneous industrial fleet at low cost, without completely replacing your machines.
Methodology: Quantifying the Financial Hemorrhage (The TCD Calculation)
For an executive or CFO, a production shutdown is not just a technical problem — it's an outright destruction of value. The calculation must go beyond surface-level revenue loss, as that ignores the fixed costs that keep running and the restart costs.
To quantify the true impact, we use the Total Cost of Downtime (TCD) formula:
TCD = Lost Contribution Margin + Labor Burden + Restart Costs + Cost of Non-Quality
This is where the analysis becomes strategic. If the stopped machine is a bottleneck, every lost minute is a sale that evaporates and can only be recovered by paying overtime (time and a half).
Lost Contribution Margin
- Calculation: (Units per hour × Profit margin per unit) × Duration of downtime.
- Note: For non-bottleneck equipment, the loss is often absorbed by inventory, but it increases your inventory carrying cost.
Labor Burden
During the stoppage, you are paying for forced inaction. This cost includes:
- The direct operator: waiting for the repair.
- Support staff: supervisors, mechanics, and electromechanical technicians mobilized on an emergency basis (thus neglecting preventive maintenance).
- Formula: ((Gross salary + Employer contributions + Benefits) / Annual hours) × Duration of downtime.
Restart Costs
A stoppage is never "clean." There is always a stabilization period after restart:
- Energy: consumption peaks when restarting motors or furnaces.
- Ramp-up time: the period when the machine runs at 50% capacity before reaching cruising speed.
Cost of Non-Quality
Particularly critical in wood, plastics, and food processing, a sudden shutdown often leads to:
- Material loss: product frozen in the machine that becomes scrap.
- Manual sorting: the labor time required to purge the system and inspect parts produced just before the shutdown.
Digital Andon and Machine Connectivity Solutions
Given everything mentioned above, an essential solution to implement for better tracking of this data is an Andon system. Several solutions exist and they provide different levels of clarity.
The ideal approach is to combine multiple methods to capture and measure stops and micro-stops. A tablet-based Andon solution, which allows the operator to capture, indicate, and specify a downtime event and trigger automations, will cover a large portion of stoppages. However, micro-stops of 45 seconds or less occurring every 10 minutes result in approximately 45 minutes of lost time per shift — nearly 30 days per year. Three 2-minute micro-stops per hour represent 10% of production capacity evaporating without anyone noticing. These are often hidden data points that go uncounted in OEE reports.
This is why it is important to pair your Andon solution with a machine connectivity solution that enables automatic data capture whenever there is downtime, productivity drops, or slowdowns on the machine.
Conclusion
The impact of uncontrolled downtime is an untapped gold mine for many companies. An intervention based on predictive data can reduce the cost of a downtime event by nearly 90% compared to a firefighting emergency response.
Investing in a digital Andon system and performance management platforms (MES/IIoT) should no longer be seen as an expense, but as an insurance policy against inefficiency. For a manufacturing SME, increasing OEE by 10 percentage points can represent gains of over $500,000 per year — a figure far exceeding what could be saved through simple fixed cost reductions.
So, can you now answer the question: "How much does one hour of downtime cost you?" 😉 Tomorrow, ask your operators to note every stop, even those lasting 30 seconds, on a single machine for 4 hours. You'll be surprised by the gap with your "official" data.