| Usage |
Door operating cycles |
Record every opening and closing cycle using a cycle counter or building-management system. |
Compare actual cycles with the door’s documented duty rating and application requirements. |
Actual use regularly exceeds the rated duty cycle, or cycle counts rise sharply without capacity planning. |
The door repeatedly operates beyond its intended duty class and develops recurring fatigue-related failures. |
Reduce unnecessary cycles, review traffic flow, and specify a higher-duty replacement when operating demand cannot be reduced. |
| Reliability |
Unplanned downtime |
Track hours from failure notification to return to service for each incident. |
Downtime remains low, predictable, and limited to planned maintenance windows. |
One failure causes extended production, loading, or environmental-control disruption. |
Downtime becomes frequent, costly, or longer because parts and repairs are no longer practical. |
Calculate downtime cost, maintain critical spare parts, and compare repair expenditure with replacement cost. |
| Repair History |
Repair frequency |
Count corrective work orders by month, quarter, and component. |
Most work is preventive, with corrective repairs remaining occasional and isolated. |
The same component fails repeatedly or corrective work orders increase for three consecutive review periods. |
Recurring failures affect major systems such as guides, springs, motors, controls, or structural panels. |
Perform root-cause analysis instead of repeated part replacement; consider redesign or full door replacement if failures persist. |
| Maintenance |
Preventive-maintenance completion |
Calculate completed planned tasks divided by scheduled tasks, expressed as a percentage. |
Planned inspections, lubrication, cleaning, adjustment, and safety tests are completed on schedule. |
Scheduled maintenance is missed, deferred, or recorded without documented findings. |
Poor maintenance history makes condition uncertain and hidden deterioration is evident during inspections. |
Use a digital checklist, assign responsible personnel, and document findings, parts, labor, and follow-up dates. |
| Operating Speed |
Opening and closing time |
Measure average and maximum travel time under normal load and temperature conditions. |
Travel time is consistent and remains within the original operating specification. |
Speed changes, hesitation, vibration, or incomplete travel occur during repeated observations. |
Control adjustments, motor repairs, and mechanical work no longer restore stable movement. |
Inspect motor, brake, controls, guides, counterbalance, and obstructions; replace the system if safe performance cannot be restored. |
| Safety |
Safety-device test results |
Record pass/fail results for photoelectric sensors, bottom-edge protection, emergency stops, interlocks, and manual release systems. |
All required safety devices respond correctly during documented periodic tests. |
Any safety device fails, responds inconsistently, or is bypassed to keep the door operating. |
Safety components are obsolete, unsupported, or cannot be reliably integrated with the existing door system. |
Remove the door from service until safe operation is restored; never operate with bypassed safety devices. |
| Energy and Environment |
Air leakage or thermal loss |
Inspect seals visually and use temperature readings, smoke testing, or energy data to identify leakage. |
Seals contact evenly, panels remain aligned, and the door closes fully without visible gaps. |
Daylight, drafts, water ingress, condensation, or abnormal heating and cooling demand is observed. |
Panels, tracks, frames, or seals are distorted enough that adjustment cannot maintain a reliable seal. |
Replace worn seals and correct alignment first; select a better-insulated or higher-cycle door when energy losses continue. |
| Mechanical Condition |
Alignment and balance |
Inspect tracks, rollers, hinges, guides, springs, cables, chains, and mounting points for wear or deformation. |
The door travels smoothly, remains balanced, and shows no abnormal rubbing, binding, or movement. |
Uneven gaps, scraping, excessive noise, vibration, loose fasteners, or visible component wear is present. |
Structural distortion, corrosion, repeated misalignment, or damaged load-bearing components affects safe operation. |
Stop unsafe operation, repair or replace damaged components, and obtain a qualified inspection for structural damage. |
| Corrosion and Damage |
Surface and structural condition |
Rate corrosion, dents, cracks, delamination, water damage, and frame deterioration during scheduled inspections. |
Damage is cosmetic, localized, and does not affect alignment, strength, sealing, or safety. |
Corrosion or impact damage affects moving parts, fasteners, panels, tracks, or protective finishes. |
Corrosion or impact damage compromises structural integrity, mounting security, or the door’s ability to close safely. |
Repair localized damage promptly; replace the door when structural condition, safety, or weather resistance cannot be restored. |
| Financial Control |
Annual repair cost |
Sum labor, parts, emergency call-outs, production losses, and temporary measures by door and year. |
Repair spending is predictable and proportionate to the door’s age, use, and criticality. |
Repair cost is rising faster than maintenance budgets or includes repeated emergency call-outs. |
Expected multi-year repair cost approaches the installed cost of a suitable replacement. |
Use a life-cycle cost review that includes downtime, energy loss, safety risk, installation, and disposal costs. |
| Parts and Support |
Parts availability |
Record lead times, discontinued parts, substitute parts, and supplier support for critical components. |
Safety-critical and high-failure parts are available within the site’s acceptable recovery time. |
Parts require long lead times, temporary substitutions, or repeated custom fabrication. |
Essential components are obsolete or unavailable, preventing reliable repair and safety compliance. |
Build a replacement forecast, stock critical parts where justified, and avoid extending service life through unsafe substitutions. |
| Replacement Planning |
Condition and risk score |
Score condition, safety, reliability, energy performance, repair cost, and operational criticality on a documented scale. |
Risk remains controlled with planned maintenance and documented corrective actions. |
Risk score increases because failures, downtime, safety findings, or repair costs are trending upward. |
The combined safety, operational, financial, and compliance risk exceeds the organization’s acceptance threshold. |
Prioritize replacement by risk and business impact, then schedule design, procurement, installation, testing, and staff training. |