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Washing Cost Calculator
Total washing cost per piece — labour, chemicals, water, fuel, overhead.
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Machine Utilization Calculator for Washing Plants
Calculate machine utilisation percentage from available hours and productive run hours. Identify idle time, planned downtime, and the revenue impact of underutilised washing machines. No account needed — numbers update as you type.
Step By Step
How to Use This Calculator
5 steps
- Enter the total available hours per shift (e.g., 8 hours).
- Input the number of shifts run per day.
- Enter planned downtime hours (cleaning, maintenance, changeovers).
- Input actual productive run hours (machine running and processing garments).
- The calculator shows utilisation %, idle time, and cost of idle capacity.
Worked Example
Machine Utilization Example
Use this sample to sanity-check your inputs and understand what the final result represents.
- 1Available Hours: 8 hr/shift × 2 shifts = 16 hours
- 2Planned Downtime (cleaning/maintenance): 1.5 hours
- 3Unplanned Downtime (breakdowns): 0.5 hours
- 4Productive Run Time: 14 hours
Final Result
Machine Utilization: 14 ÷ 16 × 100 = 87.5% | Idle Time Cost: 2 hrs × Hourly Machine Cost
Methodology
Machine Utilisation Formula
This section explains the calculation logic, assumptions, and source material used to make the result more trustworthy and easier to verify.
Machine Utilisation (%) = Productive Run Hours ÷ Available Hours × 100
Available Hours = Total Shift Hours − Planned Downtime
OEE (Overall Equipment Effectiveness) = Availability × Performance × Quality
Availability = Run Time ÷ Planned Production Time
Cost of Idle Time = Idle Hours × (Machine Hourly Cost + Labour Hourly Cost)
Practical Guidance
Machine Utilisation Improvement Tips
- 1Target machine utilisation of 80–90% for washing machines. Consistently above 90% leaves no buffer for maintenance — machines will break down more frequently.
- 2Track unplanned downtime separately from planned maintenance. Unplanned downtime is a sign of deferred maintenance and poor preventive programmes.
- 3Changeover time between different wash recipes is a major source of idle time. Standardise your changeover procedure to reduce it.
- 4Use downtime periods productively — machine cleaning during planned stops reduces the next cycle's chemical carryover contamination.
- 5OEE (Overall Equipment Effectiveness) below 60% on washing machines is a strong signal that process improvement investment will pay off quickly.
Frequently Asked Questions
What is a good machine utilisation for a washing plant?+
For garment washing machines, 75–90% utilisation is considered good. Below 70% suggests scheduling or order volume issues. Above 90% sustained for more than a few weeks typically means the plant is operating with no maintenance buffer, which leads to more frequent breakdowns.
What is OEE and how is it different from utilisation?+
OEE (Overall Equipment Effectiveness) is more comprehensive. Utilisation only measures whether the machine is running. OEE multiplies Availability (is it running?) × Performance (is it running at full speed?) × Quality (are the outputs good?). A machine can have 90% utilisation but 60% OEE if it runs slow or produces lots of rejects.
How do I reduce machine downtime?+
Implement a preventive maintenance schedule (weekly, monthly, quarterly checks), train operators to spot early warning signs (unusual noise, vibration, leaks), keep common spare parts in stock, and standardise machine cleaning procedures. Track every downtime event in a log to identify repeat failures.
How does machine utilisation affect cost per piece?+
Fixed costs (machine depreciation, maintenance, space rental) are spread over output. If your machine processes 200 pieces/hr and runs 14 hours instead of 16, you produce 400 fewer pieces while paying the same fixed costs. Your fixed cost per piece rises proportionally.