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Domain Testing: Divide and Conquer - Testing Education

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4. The minimum balance required in any checking account at Washington<br />

Mutual Bank is $50. If a customer’s balance in his/her checking account<br />

drops below $50, the account is charged a penalty of $29. The precision of<br />

the balances is calculated up to 2 decimal places after the decimal point.<br />

What variables could be involved in analysis of this group of facts? What<br />

variable do we know enough about to perform equivalence class analysis<br />

<strong>and</strong> then a boundary value analysis? Develop a series of tests by performing<br />

equivalence class analysis <strong>and</strong> boundary value analysis on this variable.<br />

Assume integer values<br />

a. What variables could be involved in analysis of this group of facts?<br />

b. What variable do we know enough about to perform equivalence<br />

class analysis <strong>and</strong> then a boundary value analysis?<br />

c. Represent this variable as a mathematical range expression. What<br />

kind of a range is this?<br />

d. What is the input domain?<br />

e. Next, identify the risks associated <strong>and</strong> list the identified risks.

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