Harvest System Productivity m³/PMH
Separate observed delivered-volume productivity per productive/scheduled machine hour and utilization; operational delays remain explicit and no machine capability guarantee.
Description
Productive and scheduled machine hours use different time denominators.
Productive and scheduled machine hours use different time denominators. Recorded delays reduce scheduled productivity and utilization without changing productive-time throughput.1
Separate observed delivered-volume productivity per productive/scheduled machine hour and utilization; operational delays remain explicit and no machine capability guarantee.
When to use Harvest System Productivity m³/PMH
Use this tool to separate observed delivered-volume productivity per productive/scheduled machine hour and utilization; operational delays remain explicit and no machine capability guarantee.
Gather the tree inventory, plot measurements or model parameters. Check diameter, area, time and moisture conventions; keep paired observations aligned.
How to use Harvest System Productivity m³/PMH and understand its results
- Gather the tree inventory, plot measurements or model parameters. Check diameter, area, time and moisture conventions; keep paired observations aligned.
- Enter deliveredVolumesM3, productiveMinutes, delayMinutes using the field table and calculation rules, then run the tool.
- Read productivityM3PerProductiveMachineHour, productivityM3PerScheduledMachineHour, machineUtilizationFraction. The explanation below defines the units, signs, ordering and any flags or placeholder values.
- If the tool reports an input issue, correct the values and run it again. Apply the stated assumptions when interpreting a successfully returned result.
| Input field | Meaning | Value type; see rules below | Requirement |
|---|---|---|---|
| deliveredVolumesM3 | Delivered volumes m3 | list of number | Required |
| productiveMinutes | Productive minutes | list of number | Required |
| delayMinutes | Delay minutes | list of number | Required |
Pair nonnegative delivered m³ and delays with positive productive minutes per record. Pool volume and times, then return both m³/hour measures and productive/scheduled utilization.
Paired lists must be nonempty and have equal lengths.
productive productivity=60volume/productive minutes; scheduled productivity=60volume/(productive+delay minutes) Units, indexing, boundary conditions and exceptional cases are defined in the calculation rules above.
| Output field | Meaning | Value type |
|---|---|---|
| productivityM3PerProductiveMachineHour | Productivity m3 per productive machine hour | number |
| productivityM3PerScheduledMachineHour | Productivity m3 per scheduled machine hour | number |
| machineUtilizationFraction | Machine utilization fraction | number |
{
"input": {
"deliveredVolumesM3": [
10,
20
],
"productiveMinutes": [
30,
30
],
"delayMinutes": [
10,
20
]
},
"output": {
"productivityM3PerProductiveMachineHour": 30,
"productivityM3PerScheduledMachineHour": 20,
"machineUtilizationFraction": 0.6666666666666666
}
}Limitations and assumptions
The observations describe recorded work. Unrecorded delays and machine capability are not inferred.
Numeric inputs and returned numeric values must be finite; an unrepresentable returned value produces an error. Numeric lists are limited to 100,000 entries; the rules above may require smaller limits. Missing required fields, extra fields, wrong value types and violations of the calculation rules are input errors.
Alternative or Complementary methods
Use Average Skidder Turn Cycle Time: Audit complete observed skidder phase cycles and actual payload throughput, not average phase duration or a generic travel-time estimate; no travel terrain, load capacity or operator safety inferred. For a complementary task, use Helicopter Log Payload Cycle Minute: Screen complete log-haul cycles from caller already-established available payload, rigging, green density and cycle duration; does not compute aircraft performance, approve lifts or certify external-load safety.
References
-
Harvest System Productivity m³/PMH — tool.io
Similar or alternative tools
- Average Skidder Turn Cycle Time
Audit complete observed skidder phase cycles and actual payload throughput, not average phase duration or a generic travel-time estimate; no travel terrain, load capacity or operator safety inferred.
- Helicopter Log Payload Cycle Minute
Screen complete log-haul cycles from caller already-established available payload, rigging, green density and cycle duration; does not compute aircraft performance, approve lifts or certify external-load safety.