Quick Answer
The software test execution time variance calculator computes execution time variance from the input values you provide.
Calculator
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Find Engineering Solutions →Result Interpretation
Software Test Execution Time Variance Calculator computes Execution time variance in s² using the defined engineering formula and the input values provided. Execution time variance is expressed in s². No universal acceptance threshold is defined by this calculator.
Worked Example
Verified calculation
Given:
- Test execution time sample 1 = 1
- Test execution time sample 2 = 1.2
- Test execution time sample 3 = 1.1
- Test execution time sample 4 = 1.3
- Test execution time sample 5 = 1.4
- Mean execution time across samples = 1.2
Expected Result:
- Execution time variance = 0.02
Engineering Interpretation:
Under the given input conditions, the calculated result is: Execution time variance = 0.02 s².
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from deterministically validated test cases.
Formula / Method
execution time variance = (pow(test execution time sample 1 - mean execution time across samples, 2) + pow(test execution time sample 2 - mean execution time across samples, 2) + pow(test execution time sample 3 - mean execution time across samples, 2) + pow(test execution time sample 4 - mean execution time across samples, 2) + pow(test execution time sample 5 - mean execution time across samples, 2)) / 5.0Execution time variance.
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| t1 | Test execution time sample 1 | INPUT | Test execution time sample 1 |
| t2 | Test execution time sample 2 | INPUT | Test execution time sample 2 |
| t3 | Test execution time sample 3 | INPUT | Test execution time sample 3 |
| t4 | Test execution time sample 4 | INPUT | Test execution time sample 4 |
| t5 | Test execution time sample 5 | INPUT | Test execution time sample 5 |
| mean | Mean execution time across samples | INPUT | Mean execution time across samples |
| result | Execution time variance | OUTPUT | Execution time variance |
Calculation Steps
- Enter the test execution time sample 1 in s.
- Enter the test execution time sample 2 in s.
- Enter the test execution time sample 3 in s.
- Enter the test execution time sample 4 in s.
- Enter the test execution time sample 5 in s.
- Enter the mean execution time across samples in s.
- Step 1: Compute execution time variance.
- Read the execution time variance (s²) from the results.
Frequently Asked Questions
What does this calculator calculate?
The Software Test Execution Time Variance Calculator estimates Execution time variance based on the input parameters you provide
Why is test execution time sample 1 important in this calculation?
test execution time sample 1 is used directly in the calculation of execution time variance. Its effect on the result depends on the complete formula and the values of the other inputs.. When you enter test execution time sample 1 in s, the calculator uses it in the engineering formula to compute the output
How should I interpret the result execution time variance?
The calculator outputs execution time variance in s². The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Test execution time sample 1 (s), Test execution time sample 2 (s), Test execution time sample 3 (s), Test execution time sample 4 (s), Test execution time sample 5 (s), Mean execution time across samples (s). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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