niosh-lifting-calculator

name	niosh-lifting-calculator
description	NIOSH Lifting Equation calculator for manual material handling risk assessment.
allowed-tools	Bash(*) Read Write Edit Glob Grep WebFetch
metadata	{"author":"babysitter-sdk","version":"1.0.0","category":"ergonomics","backlog-id":"SK-IE-020"}
graph	{"domains":["domain:industrial-engineering"],"skillAreas":["skill-area:statistical-analysis","skill-area:organizational-design","skill-area:data-analysis"],"roles":["role:operations-analyst","role:research-engineer"]}

niosh-lifting-calculator

You are niosh-lifting-calculator - a specialized skill for assessing manual lifting tasks using the NIOSH Lifting Equation.

Overview

This skill enables AI-powered lifting risk assessment including:

• Recommended Weight Limit (RWL) calculation
• Lifting Index (LI) computation
• Multiplier factor analysis (HM, VM, DM, AM, FM, CM)
• Single-task and multi-task analysis
• Risk level classification
• Work redesign recommendations
• Comparison of job modifications

Capabilities

1. NIOSH Lifting Equation

from dataclasses  dataclass
 typing  
 math


 :
    
    
    load_weight_lbs:   

    
    horizontal_origin:   
    vertical_origin:   

    
    horizontal_dest:   
    vertical_dest:   

    
    vertical_travel:   
    asymmetry_angle:   
    frequency:   
    duration:   
    coupling:   

 ():
    
    LC =   

    
    H = params.horizontal_origin  at_origin  params.horizontal_dest
    V = params.vertical_origin  at_origin  params.vertical_dest

    
    
    H = (, (H, ))  
    HM =  / H

    
    
    VM =  -  * (V - )
    VM = (, VM)  

    
    
    D = (, params.vertical_travel)  
    DM =  + ( / D)
    DM = (, DM)  

    
    
    A = (, params.asymmetry_angle)  
    AM =  - ( * A)

    
    FM = get_frequency_multiplier(params.frequency, params.duration, V)

    
    CM = get_coupling_multiplier(params.coupling, V)

    
    RWL = LC * HM * VM * DM * AM * FM * CM

     {
        : (RWL, ),
        : {
            : LC,
            : (HM, ),
            : (VM, ),
            : (DM, ),
            : (AM, ),
            : (FM, ),
            : (CM, )
        },
        :   at_origin  
    }

 ():
    
    
    FM_TABLE = {
        
        (, , ): , (, , ): ,
        (, , ): , (, , ): ,
        (, , ): , (, , ): ,
        (, , ): , (, , ): ,
        (, , ): , (, , ): ,
        (, , ): , (, , ): ,
        (, , ): , (, , ): ,
        
    }

    
    v_category = vertical >= 
    key = ((, frequency), (duration), v_category)

    
     frequency <= :
         
     frequency >= :
         
    :
        
         (,  -  * frequency)

 ():
    
    CM_TABLE = {
        (, ): ,
        (, ): ,
        (, ): ,
        (, ): ,
        (, ): ,
        (, ): 
    }

    v_category = vertical >= 
     CM_TABLE.get((coupling.lower(), v_category), )