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Codermetrics
book

Codermetrics

by Jonathan Alexander
August 2011
Intermediate to advanced
264 pages
8h 42m
English
O'Reilly Media, Inc.
Content preview from Codermetrics

Name

Gain Rate

Synopsis

Purpose
Determine the average amount of time it takes to accumulate each Gain.
Formula
Gain Rate = (Time Elapsed / Gain)

Example

A new software release is issued at the end of June. The following new user activations (Wins) are recorded for the three months following release:

Month of July: 225 new user activations
Month of August: 270 new user activations
Month of September: 350 new user activations

The following trial data is recorded for the three months following the product release:

Month of July: 81 Trials Complete, 67 Successful Trials
Month of August: 107 Trials Complete, 88 Successful Trials
Month of September: 142 Trials Complete, 119 Successful Trials

The Total number of Unsuccessful Trials during this period can then be calculated as follows:

Unsuccessful Trials in July = 81 – 67 = 14
Unsuccessful Trials in August = 107 – 88 = 29
Unsuccessful Trials in September = 142 – 119 = 23

The following user deactivations or cancellations (Losses) are recorded for the three months following release:

Month of July: 18 deactivations or cancellations
Month of August: 13 deactivations or cancellations
Month of September: 24 deactivations or cancellations

Using the above data, the Gain per month can be calculated as:

Gain for July = 225 - (14 + 18) = 193
Gain for August = 270 / (29 + 13) = 228
Gain for September = 350 / (23 + 24) = 303

From which the following are the Gain Rate calculations per month and the Average:

Gain Rate in July (month with 31 days) = (31 × 24) / 193 = 3 hours 51 ...
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Publisher Resources

ISBN: 9781449312664Errata Page