Number of Man-Hour Worked given Frequency Rate Calculator

✖Number of Disabling Injuries refers to the injuries that result in either death or permanent disability, or temporary total disability after the day of injury.ⓘ Number of Disabling Injuries [I_n]			+10% -10%
✖Injury Frequency Rate defines the number of disabling injuries per one lakh man hours worked.ⓘ Injury Frequency Rate [I_r]			+10% -10%

✖Man Hour is used to measure the efforts needed to complete a task. 1 man hour is work completed in an hour of uninterrupted effort by an average worker.ⓘ Number of Man-Hour Worked given Frequency Rate [N_mh]

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Formula

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Number of Man-Hour Worked given Frequency Rate

Formula

`"N"_{"mh"} = "I"_{"n"}*100000/"I"_{"r"}`

Example

`"2500"="20"*100000/"800"`

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Number of Man-Hour Worked given Frequency Rate Solution

STEP 0: Pre-Calculation Summary

Formula Used

Man Hour = Number of Disabling Injuries*100000/Injury Frequency Rate
N_mh = I_n*100000/I_r
This formula uses 3 Variables

Variables Used

Man Hour - Man Hour is used to measure the efforts needed to complete a task. 1 man hour is work completed in an hour of uninterrupted effort by an average worker.
Number of Disabling Injuries - Number of Disabling Injuries refers to the injuries that result in either death or permanent disability, or temporary total disability after the day of injury.
Injury Frequency Rate - Injury Frequency Rate defines the number of disabling injuries per one lakh man hours worked.

STEP 1: Convert Input(s) to Base Unit

Number of Disabling Injuries: 20 --> No Conversion Required
Injury Frequency Rate: 800 --> No Conversion Required

STEP 2: Evaluate Formula

Substituting Input Values in Formula

N_mh = I_n*100000/I_r --> 20*100000/800

Evaluating ... ...

N_mh = 2500

STEP 3: Convert Result to Output's Unit

2500 --> No Conversion Required

FINAL ANSWER

2500 <-- Man Hour

(Calculation completed in 00.004 seconds)

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Created by Chandana P Dev

NSS College of Engineering (NSSCE), Palakkad

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< 8 Construction Safety Management Calculators

Injury Frequency Rate given Injury Index

Go Injury Frequency Rate = Injury Index*1000/(Number of Disabling Injuries*Injury Severity Rate)

Severity Rate given Injury Index

Go Injury Severity Rate = Injury Index*1000/(Number of Disabling Injuries*Injury Frequency Rate)

Injury Index

Go Injury Index = Injury Frequency Rate*Injury Severity Rate*Number of Disabling Injuries/1000

Number of Disabling Injuries given Frequency Rate

Go Number of Disabling Injuries = Injury Frequency Rate*Man Hour/100000

Number of Man-Hour Worked given Frequency Rate

Go Man Hour = Number of Disabling Injuries*100000/Injury Frequency Rate

Injury Frequency Rate

Go Injury Frequency Rate = Number of Disabling Injuries*100000/Man Hour

Number of Days Lost given Severity Rate

Go Lost Days = Injury Severity Rate*Man Hour/1000

Injury Severity Rate

Go Injury Severity Rate = Lost Days*1000/Man Hour

Number of Man-Hour Worked given Frequency Rate Formula

Man Hour = Number of Disabling Injuries*100000/Injury Frequency Rate
N_mh = I_n*100000/I_r

What are the Approaches to Improve Safety in Construction Field?

Many rules and recommendations have been laid down as the result of research by societies, organizations and institutions on how to improve safety. Recognizing the importance of safety performance, a contractor can approach the problem in four different ways.
1 Organizational approach
i. Safety departments
ii. Committee
iii. Field Procedures
iv. Incentives
v. Safety Cost
2 Physical Approach
3 Economic incentives
4 Behavioral Approach

What is Disabling Injury?

The disabling injury means an injury which causes a loss of working time beyond the term, shift or day during which the injury occurred. Thus injury-frequency rate denotes how frequently accidents occurred. Bat it does not take into account the time lost because of an injury.

How to Calculate Number of Man-Hour Worked given Frequency Rate?

Number of Man-Hour Worked given Frequency Rate calculator uses Man Hour = Number of Disabling Injuries*100000/Injury Frequency Rate to calculate the Man Hour, The Number of Man-Hour Worked given Frequency Rate formula is defined as the amount of work performed by the average worker in one hour. Man Hour is denoted by N_mh symbol.

How to calculate Number of Man-Hour Worked given Frequency Rate using this online calculator? To use this online calculator for Number of Man-Hour Worked given Frequency Rate, enter Number of Disabling Injuries (I_n) & Injury Frequency Rate (I_r) and hit the calculate button. Here is how the Number of Man-Hour Worked given Frequency Rate calculation can be explained with given input values -> 2500 = 20*100000/800.

FAQ

What is Number of Man-Hour Worked given Frequency Rate?

The Number of Man-Hour Worked given Frequency Rate formula is defined as the amount of work performed by the average worker in one hour and is represented as N_mh = I_n*100000/I_r or Man Hour = Number of Disabling Injuries*100000/Injury Frequency Rate. Number of Disabling Injuries refers to the injuries that result in either death or permanent disability, or temporary total disability after the day of injury & Injury Frequency Rate defines the number of disabling injuries per one lakh man hours worked.

How to calculate Number of Man-Hour Worked given Frequency Rate?

The Number of Man-Hour Worked given Frequency Rate formula is defined as the amount of work performed by the average worker in one hour is calculated using Man Hour = Number of Disabling Injuries*100000/Injury Frequency Rate. To calculate Number of Man-Hour Worked given Frequency Rate, you need Number of Disabling Injuries (I_n) & Injury Frequency Rate (I_r). With our tool, you need to enter the respective value for Number of Disabling Injuries & Injury Frequency Rate and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.

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