Time Estimation method for Testing Process

Note : folloing method is based on use case driven specification.

Step 1 : count number of use cases (NUC) of system

step 2 : Set Avg Time Test Cases(ATTC) as per test plan

step 3 : Estimate total number of test cases (NTC)

Total number of test cases = Number of usecases X Avg testcases per a use case

Step 4 : Set Avg Execution Time (AET) per a test case (idelly 15 min depends on your system)

Step 5 : Calculate Total Execution Time (TET)

TET = Total number of test cases * AET

Step 6 : Calculate Test Case Creation Time (TCCT)

useually we will take 1.5 times of TET as TCCT

TCCT = 1.5 * TET

Step 7 : Time for ReTest Case Execution (RTCE) this is for retesting

useually we take 0.5 times of TET

RTCE = 0.5 * TET

Step 8 : Set Report generation Time (RGT

usually we take 0.2 times of TET

RGT = 0.2 * TET

Step 9 : Set Test Environment Setup Time (TEST)

it also depends on test plan

Step 10 : Total Estimation time = TET + TCCT+ RTCE + RGT + TEST + some buffer...;)

Example

Total No of use cases (NUC) : 227

Average test cases per Use cases(AET) : 10

Estimated Test cases(NTC) : 227 * 10 = 2270

Time estimation execution (TET) : 2270/4 = 567.5 hr

Time for creating testcases (TCCT) : 567.5*4/3 = 756.6 hr

Time for retesting (RTCE) : 567.5/2 = 283.75 hr

Report Generation(RGT) = 100 hr

Test Environment Setup Time(TEST) = 20 hr.

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Total Hrs 1727.85 + buffer

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here 4 means Number of testcases executed per hour

i.e 15 min will take for execution of each test case