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Tutorial - Configuration Example

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The Configuration Example is summarized below. The test system has five test factors with values as follows.
Test FactorNumber of ValuesTest Factor Values
1. Operating system2WXP WME
2. Display resolution3low medium high
3. Connection4dial-up dsl cable lan
4. Browser4IE6 NS7 MZL1.5 IE5
5. Application3App1 App2 App3
There are no constraints among the factor values, so any combination is allowed as a test case, and only one block is needed. The request for this example is shown below.
Configuration Example
Operating System
Display resolution
Connection
Browser
Application
#
WXP WME
low medium high
dial-up dsl cable lan
IE6 NS7 MZL1.5 IE5
App1 App2 App3
The results table below has columns for a Test Case ID, for each test factor and for a Combo Countdown. The top row of the table labels these columns. The next row shows the number of values for each factor and the total number of factor value pairs in the Combo Countdown column.
Test
Case ID
Operating SystemDisplay resolutionConnectionBrowserApplicationCombo
Countdown
2 Values3 Values4 Values4 Values3 Values101
1WMElowdslIE5App191
2WMEhighlanIE6App281
3WMEmediumcableMZL1.5App371
4WXPmediumlanNS7App161
5WXPlowdial-upIE5App352
6WXPhighdslMZL1.5App243
7WMElowcableNS7App236
8WMEhighdial-upMZL1.5App130
9WXPmediumcableIE6App124
10WMEhighdslNS7App319
11WMEmediumdial-upNS7App215
12WXPhighcableIE5App211
13WMElowlanMZL1.5App37
14WMEmediumdslIE6App34
15WXPlowdial-upIE6App12
16WMEmediumlanIE5App30

In this example there are

2 • 3+ 2 • 4+ 2 • 4+ 2 • 3
+ 3 • 4+ 3 • 4+ 3 • 3
+ 4 • 4+ 4 • 3
+ 4 • 3= 101
uncovered pairs of values before any test cases are run. The row labeled 1 gives the values of the test factors for the first test case. It also shows that after the first test case is run, 91 pairs of values remain uncovered. (10 pairs of values are covered by each of the first four test cases.) Successive rows give the suggested test cases with their corresponding numbers of uncovered factor value pairs in the Combo Countdown column. After test case number 16, all the pairs of values are covered.

There must be at least 4 • 4 = 16 test cases to include the pairs of values for the two factors with the most values (4). In this example the other pairwise combinations require no additional test cases.

<Reading Results Constraints Example>

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