Calculates performance by period from a given data set and target stock

Usage

calc_performance(incompletes_data, target_bin)

Arguments

incompletes_data: tibble; requires column headers of "period", "months_waited_id" and "value", where value is the count of incomplete pathways by period and the number of months the patients have waited
target_bin: integer; the number of months waited where patients that have waited for greater or equal to that number of months have breached performance

Value

A two column tibble containing "period" and "prop" columns, where prop is the proportion of people that are on the waiting list in each period that have waited for the time less that specified by the target_bin