# unit_cum_exact: Exact Cumulative Unit Learning Curve Function In learningCurve: An Implementation of Crawford's and Wright's Learning Curve Production Functions

## Description

Provides the exact cumulative time or cost required for units m through n (inclusive) using the Crawford unit model

## Usage

 `1` ```unit_cum_exact(t, n, r, m = 1, na.rm = FALSE) ```

## Arguments

 `t` time (or cost) required for the mth unit of production `n` The unit you wish to predict the cumulative time (or cost) to `r` learning curve rate `m` mth unit of production (default set to 1st production unit) `na.rm` Should `NA` values be removed?

## Examples

 ```1 2 3 4 5 6 7 8``` ```library(learningCurve) # An estimator believes that the first unit of a product will # require 100 labor hours. How many total hours will be required # for 125 units given the organization has historically experienced # an 85% learning curve? unit_cum_exact(t = 100, n = 125, r = .85) ## [1] 5201.085 ```

learningCurve documentation built on May 2, 2019, 2:13 p.m.