Door Problems
Door operators, locks, sensors and door mechanisms are common areas associated with recurring lift faults.
VOLO TOOL
Lift Downtime & Reliability Calculator
Find out how often your lift is unavailable, estimate annual downtime and understand its operational availability.
Lift Reliability
Enter your actual breakdown data
How reliable is your lift?
Use recent maintenance or breakdown records where possible for a more meaningful estimate.
Usually 365 for residential and commercial lifts.
Enter the approximate period the lift is expected to be available.
Include service-affecting breakdowns.
Total hours per year spent unavailable for planned maintenance.
Breakdown downtime
Enter the average time the lift remains unavailable during each breakdown.
Example: 2 hours per breakdown.
Optional operational impact estimate.
Your lift reliability estimate
Based on the information you entered.
Annual downtime
—
hours / year
Monthly downtime
—
hours / month
Availability
—
estimated
Avg. breakdown interval
—
days
Reliability indication
—
Estimated passenger/service impact
—
Important:
This calculator provides an operational estimate based
on the figures entered. It is not a statutory reliability
assessment, engineering certification or prediction of
future failures. Actual lift availability depends on
maintenance, usage, component condition, power quality,
operating environment and other factors.
Experiencing frequent lift downtime?
A recurring breakdown pattern may justify a deeper technical inspection or maintenance review.
Lift Downtime and Reliability
Lift downtime refers to the period during which an elevator is unavailable for normal passenger or building use. Tracking downtime can help property owners, facility managers and apartment associations understand whether a lift is experiencing occasional interruptions or a recurring reliability problem.
Volo's Lift Downtime & Reliability Calculator uses basic operating and breakdown information to estimate annual downtime, monthly downtime, availability and the approximate interval between breakdowns.
What information should I use?
For a useful estimate, use actual maintenance records where available. The most useful information includes the number of service-affecting breakdowns, average repair time and planned maintenance downtime.
- Number of breakdowns in a typical year
- Average downtime for each breakdown
- Planned maintenance downtime
- Approximate lift operating hours per day
- Number of days the lift is expected to operate
What is lift availability?
Lift availability is an estimate of the proportion of the expected operating time during which the lift is available for service. Higher availability generally means less operational downtime, while repeated or lengthy breakdowns reduce availability.
Why does lift downtime matter?
Lift downtime can affect residents, visitors, employees, patients, customers and building operations. The impact can be particularly noticeable in apartment buildings, offices, hospitals, hotels, commercial buildings and other properties that depend heavily on vertical transportation.
What can cause frequent lift downtime?
Controller & Drive
Controller, drive and communication faults can result in repeated service interruptions.
Power Quality
Power interruptions, voltage issues and phase-related problems can affect lift operation.
Ageing Components
Older equipment can require increasing attention as components and systems age.
Maintenance
Maintenance quality, response time and preventive maintenance practices can influence downtime.
Operating Environment
Usage intensity, dust, heat, moisture and building conditions can influence equipment performance.
How can lift downtime be reduced?
Reducing downtime generally starts with identifying recurring fault patterns rather than simply counting breakdowns. Maintenance records can be reviewed to determine which components or systems repeatedly contribute to service interruptions.
Lift Downtime & Reliability Calculator FAQs
What is lift downtime?
Lift downtime is the period when an elevator is unavailable
for normal operation because of a breakdown, maintenance,
inspection or another operational interruption.
How is lift availability calculated?
This calculator estimates availability by comparing
estimated unavailable time with the expected operating
time entered by the user.
What is a good lift availability percentage?
There is no single percentage that applies to every lift
or building. Expected availability depends on equipment,
usage, maintenance arrangements, operating conditions and
the way downtime is measured.
How can I calculate lift downtime?
A basic estimate can be made by adding the downtime from
service-affecting breakdowns and planned maintenance, then
comparing the resulting unavailable hours with the expected
operating hours.
Why does my lift break down frequently?
Frequent breakdowns can have different causes, including
door systems, controls, electrical connections, drives,
power quality, ageing components, operating conditions or
maintenance-related factors. A recurring fault pattern
normally requires technical investigation.
Does this calculator predict my next lift breakdown?
No. The calculator estimates historical or entered
downtime and availability. It does not predict the date
or probability of a future lift failure.