The basement water pump has failed for the third time this year. Now comes the question:
Should we repair it again, or replace it?
In most buildings, the answer comes down to one number: the cost of the latest repair. But that number doesn’t tell you what the asset has really cost over its life, or how quickly it’s getting worse. This article looks at five data points that give a better answer.
Why the Latest Repair Cost Can Lead to the Wrong Decision
There are several reasons why looking only at the latest repair can be misleading.
1. Small repair costs can add up
A repair that costs a few hundred dollars is easy to approve. Because each repair is reviewed separately, organizations often fail to look at the total amount spent on the same asset over time.
After several years, cumulative repair costs can approach the cost of a replacement without anyone realizing it.
2. Downtime has a cost, even without an invoice
When equipment fails, the repair bill is only part of the cost.
The equipment may be unavailable. Tenants or building users may be affected. Maintenance technicians may have to stop other work to respond to the failure.
None of these costs may appear on a repair invoice, but they still affect the operation of the building.
3. People’s memory is not an asset history
The technician who originally maintained the equipment may no longer be with the company. Contractors change. Repair information may be scattered across spreadsheets, chat messages, invoices, and paper documents.
Eventually, all that remains may be someone saying:
“It seems to be breaking down more often lately.”
That may be true, but it is not enough information to support a maintenance budget or explain a replacement decision to management.
The better question is: What does the asset’s history actually tell us?
5 Data Points to Check Before You Repair or Replace Equipment
1. Cumulative Repair Cost vs. Replacement Cost
The first number to look at is the total amount spent repairing the asset over its operating life. This should include:
- Labor
- Spare parts
- Contractor costs
- Other direct repair expenses
Then compare the cumulative repair cost with the replacement cost: the cost of purchasing and installing a new equivalent asset.
This comparison helps show how much money has already been spent maintaining the existing equipment compared with the cost of replacing it.
Some organizations use a threshold such as 50% of replacement cost as a trigger to begin seriously evaluating replacement. However, 50% should not be treated as a universal rule. The decision should also consider:
- Equipment age
- Failure frequency
- Downtime
- Asset criticality
- Spare-parts availability
- Energy consumption
- Future maintenance costs
The key is not the percentage alone. It is the trend behind the number.
2. Time Between Equipment Failures
The second data point is how long the equipment operates before failing again. A common reliability metric is MTBF (Mean Time Between Failures).
For example, if a pump operates for 12 months and experiences three failures during that period, its average time between failures is approximately four months.
But the most useful information is not a single MTBF number. It is the trend. Suppose an asset historically failed once a year. Then the failures become:
- Once every 12 months
- Once every 6 months
- Once every 4 months
The equipment may still be repairable, but its reliability is clearly declining. At that point, each repair may be addressing the immediate failure without restoring the asset to a reliable long-term condition.
A falling MTBF can be an early warning that repair is becoming less sustainable.
3. Downtime and Operational Impact
The number of failures does not tell the whole story. You also need to ask: What happens when the equipment fails? Track:
- Total downtime
- Systems affected
- Number of users or tenants affected
- SLA or contractual impact
- Emergency labor required
- Other maintenance work delayed because of the failure
For example, a ventilation fan in a storage room that stops for two days may have a relatively low operational impact. A water pump, elevator, or critical HVAC system that stops for two hours could have a much larger impact.
This is why asset criticality should always be considered alongside maintenance cost. An asset that rarely fails but has a major operational impact may deserve replacement sooner than an asset that fails frequently but has little effect on the building.
4. Equipment Age vs. Expected Service Life
An old asset does not automatically need to be replaced. However, when equipment approaches or exceeds its expected service life, it is worth monitoring whether maintenance costs and failure frequency are increasing.
Calendar age is only part of the picture. You should also consider operating hours. Two pumps installed in the same year may have very different levels of wear if one operates 24/7 while the other only runs during business hours.
For equipment with high operating hours, tracking actual usage can provide a much better picture of its condition than installation date alone.
5. Warranty, Spare Parts, and Energy Costs
Before making a replacement decision, there are three additional factors that are often overlooked.
Is the equipment still under warranty?
If it is, some or all repair costs may be covered. Checking the warranty status before approving a repair can prevent unnecessary expenses.
Are spare parts still available?
If the equipment model has been discontinued, spare parts may become harder to source. Longer lead times can mean longer downtime during the next failure. Replacement parts may also become more expensive.
How much energy could a new asset save?
For energy-intensive equipment such as pumps, chillers, and HVAC systems, energy efficiency can be an important part of the replacement business case. A new asset may have a higher upfront cost but lower operating costs over its lifetime.
The right question is therefore not simply “How much does the new equipment cost?” It is “What will this asset cost us to own and operate from this point forward?”
A Practical Example: One Water Pump
Let’s look at a hypothetical water pump. Assume the replacement cost, including installation, is $12,000. If you only look at the latest repair, you might think: “Let’s repair it for now.” But the asset’s three-year history tells a different story.
The cumulative repair cost has reached $7,100, or approximately 59% of the replacement cost. At the same time:
- Failures increased from 1 to 3 per year.
- The average time between failures fell from 12 months to about 4 months.
- Annual downtime increased from 6 hours to 30 hours.
If these trends continue, the total cost of maintaining the existing pump could approach the cost of a replacement. That gives the facility team a much stronger business case than simply saying:
“The equipment is old.”
The important point is not to wait until the equipment becomes impossible to repair. It is to understand how quickly its cost and reliability are changing.
Why Most Buildings Struggle to Answer This Question
The data needed to make this decision usually already exists. The problem is that it is often stored in different places. A repair request may be in a chat group. Spare-part costs may be in a spreadsheet. Invoices may sit with the accounting team. Warranty information may be in handover documents. The installation date may be buried in construction records.
All the information exists, but it is not connected to the same asset.
When management asks:
“How much have we spent maintaining this pump?”
The maintenance team may have to search through multiple files, messages, invoices, and documents to reconstruct the answer. And after all that work, the answer may still be incomplete. So the conversation goes back to: “It seems to be breaking down more often.”
The problem is not necessarily a lack of data. It is a lack of connected asset history.
Scattered information is a costly problem on construction projects too. Read more in The Most Expensive Cost in Construction Isn’t Steel or Concrete.
Frequently Asked Questions
When should you repair or replace equipment?
You should seriously consider replacement when multiple warning signs appear together. For example, cumulative repair costs are approaching a significant percentage of replacement cost, failures are becoming more frequent, downtime is increasing, or the equipment is approaching the end of its expected service life. The asset’s criticality and operational impact should also be considered.
What is the 50% rule for equipment replacement?
The 50% rule is a general guideline sometimes used to trigger a replacement evaluation when cumulative repair costs reach around 50% of the replacement cost. It is not a universal rule. A critical asset with high downtime costs may justify replacement earlier, while a low-criticality asset may remain economical to repair even after reaching the threshold.
How do you calculate MTBF?
MTBF, or Mean Time Between Failures, is generally calculated by dividing the total operating time by the number of failures during that period. For example, if equipment operates for 12 months and fails three times: MTBF = 12 months ÷ 3 failures = 4 months. The trend is often more useful than a single MTBF value.
The Real Question Is Not “Can We Repair It?”
The question “Repair or replace?” should not be answered based only on the latest repair invoice. It should be answered using the asset’s complete history. You need to know:
- How much have we already spent?
- Is the equipment failing more frequently?
- How much downtime is it causing?
- Is it still reliable enough for its role?
- What will it cost us to keep it running from here?
When this information is visible, the decision no longer depends on one person’s memory or opinion. And the next time someone says “The equipment is getting old,” you can ask a better question: “What does the data tell us?”
From “It’s getting old.” to a maintenance decision backed by data
Sitearound makes asset history easier to track without relying on scattered spreadsheets, repair records, and people’s memory. Repair costs, labor, spare parts, downtime, and maintenance history are connected to individual assets through Work Orders. When the next repair request comes in, open the asset and review its history, cumulative costs, and warranty information before deciding what to do next.