How to calculate number required at a certain percentage to achieve target goal

ilagas

New Member
Joined
Jan 13, 2021
Messages
1
Office Version
  1. 2016
Platform
  1. Windows
Hi Good day to everyone.
I need help in getting a formula of this problem. How can we solve for no of task required completed at a certain timeframe for the employees to pass at 100% to goal(lower is better). Im familiar but im not really good at algebra so now Im having a hard time solving this problem

Variables are
1.) No of tasks
2.) % to goal of the time employee took to complete the total no of task
3.) Goal at 100%
4.) No of tasks needed at at a certain timeframe in percentage(ex 90% of the time required) for the employee to finish

For example.
Employee 1 has 139% to goal at 20 tasks and his target goal is 100%(Lower the better). How many tasks does he needs to complete at 90% timeframe to reach 100%. I cant seem to find a solution online.
 

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There's a similar question here: Compute Surveys Needed to Meet the Target

Using that basis, I get 80 extra tasks to bring the score just within (i.e. below) the 100% requirement.

BUT: This will work only if you are giving equal weight to each task's %. If you want to weight by length of task (?) we'll need a different formula.

Simple example: Is your average 109% or 150%?

ABCD
1TaskTarget hrsActual hrsPercentage
2A12200%
3B1010100%
41112109%
Sheet7
Cell Formulas
RangeFormula
D2:D4D2=C2/B2
B4:C4B4=SUM(B2:B3)
 
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