1) The document discusses calculating a Scrum Efficiency Index (SEI) to compare the productivity of different time periods with varying staffing levels. 2) The SEI is calculated by dividing a period's velocity (work completed) by the total productive hours for that period. 3) An example compares two periods - Period 1 had a velocity of 26 from 300 hours for a SEI of 0.09, while Period 2 had a velocity of 50 from 120 hours for a SEI of 0.42, showing a 78% improvement in efficiency.

1. Company
USING THE SCRUM EFFICIENCY INDEX (SEI)TO COMPARE
PERIODS WITH VARYING STAFFING LEVELS
In Scrum, when weset up a time period, we keep track of velocity so we can compare how
fast we are moving. This is affectedby a few things, velocity and capacity. Capacity is also
affectedby available productive hours. So what weare really trying to derive is how
productive is each hour spent in the scrum environment.
Here is the method I used to calculate the answer to that question:
Assumptions:
1. All velocity points are equal, forexample, a Fibonaccisequence must always follow the
same scale in relationship to time, see Table 1. In keeping withAgile principles, close
enough is good enough. We don’t pay for precision when buying close enough costs
nothing. You willcreate yourown scale, the trickis to remain consistent.
TABLE 1: CREATE AN ESTIMATE TO TIME RELATIONSHIP
Estimate 1 2 3 5 8 13
Hours Represented .5 1 5 10 20 40
2. Available ProductiveHours is any time spent in the Scrum or working on Scrum work. This
will vary from person to person for each Scrum for each period.
SEI = 𝑣 ÷ Σ(𝑃𝑟𝑜𝑑𝑢𝑐𝑡𝑖𝑣𝑒 𝐻𝑜𝑢𝑟𝑠)
Example:
Period 1:
v = 26
Prod Hrs = 300
.09 = 26/300
Period 2:
v = 50
Prod Hrs = 120
.42 = 50/120
To compare these twoperiods, subtract the
later period from the earlier period and
divide the result by the later period:
.42-.09 = .33
.33/.42 = .785
This shows a 78% improvement in the
efficiency of the process.
Charles Cooper, MA, MBA, PMP,ACP
Lean Six Sigma Master Black Belt