This is the index to analyze test of KRA.
1. Difficulty Index: Determines the difficulty level of an item.[ KRA ]
Steps
1. Assemble the past KRA results in chronological order according to past scores, from higher to lower scores
2. Place the results in two groups: High Score Group and Low Score Group
3. For each KRA you analyze, compute the scores to that item in each group.
For example, in KRA 1 , the High Group may have 9, 8,10,8,7 which totals =42
while the Low Group may have 2,3.2,1,4 which totals= 12
Difficulty Index
1. Add the total numbers in both groups and divide this number by the total number of elements [10]
from the above exercise 42 + 12 = 54 is divided by 10, that 54/10.
2. Multiply this figure by 100.
from the above exercise, 54/10 x 100= 54%
IN THIS example, the difficulty index for the KRA 1 is 54.
I have used a very simple example to show the process.
In real life situations it would vary widely.
The difficulty index indicates
-KRA positioning
-reflects on the nature of the jobs/ tasks
-training required to lift the game
-aptitude of individual employees
-attitude towards the tasks
-competence required to tackle the job
etc etc.
hope this is useful to you
regards
LEO LINGHAM