Boundary Value Analysis (BVA) is a essential technique in application testing that allows identify errors from the boundaries regarding input values. This approach is based on the principle that errors are more likely to happen at the ends of input amounts as opposed to within the ranges themselves. In this article, we will explore a number of case studies featuring the successful application of BVA inside real projects throughout various domains. These examples illustrate how BVA can improve testing efficiency, uncover critical defects, in addition to improve overall computer software quality.
Case Study 1: Banking App – Account Equilibrium Validation
Background:
A major bank has been developing an on-line banking application along with features for taking care of account balances, transferring funds, and generating statements. One of the critical functionalities was to validate transactions based upon account balance restrictions. For instance, specific transactions were restricted depending on whether typically the balance was beneath or above a new specific threshold.
Putting on BVA:
The screening team used BVA to focus on boundary values for account amounts. They identified crucial boundary values this kind of as:
The minimal allowed balance (e. g., $0).
Typically the threshold balance intended for transactions (e. g., $100).
The maximum allowable balance for your account.
Test Scenarios:
Bare minimum Boundary Test: Experimented with a transaction along with an account equilibrium of $0. Typically the system should appropriately handle cases exactly where the balance is zero and guarantee transactions do not proceed.
Just Above Minimum: Tested using a balance of $1 to ensure that transactions just above the bare minimum threshold are prepared correctly.
Threshold Boundary Test: Conducted assessments with balances exactly at the $100 threshold to make sure correct handling of transactions as of this reduce.
Just Above Tolerance: Tested with a equilibrium of $101 in order to verify that deals above the threshold are processed needlessly to say.
Maximum Boundary Check: Validated the technique with the maximum permitted balance to make sure it handles top limits appropriately.
Result:
By applying BVA, the team determined several defects, which includes:
Incorrect handling of transactions when typically the balance was specifically $0, leading to unsuccessful transactions which should include been allowed.
Issues with transactions at the $100 threshold because of to off-by-one errors in the approval logic.
These results were addressed, ultimately causing improved system stability and customer fulfillment.
Case Study 2: E-Commerce Platform – Discount Code Application
History:
An e-commerce program offered various low cost codes that might be applied at checkout. The discount system acquired multiple rules structured on the complete purchase amount, like minimum purchase needs for several discounts.
App of BVA:
The particular testing team applied BVA to test out the use of discount unique codes by concentrating on boundary values from the order amounts. Key border values included:
Lowest purchase amount required for discounts (e. g., $50).
Tolerance amounts for various discount levels (e. g., $100, $200).
Test Scenarios:
Lowest Purchase Boundary Test out: Tested with some sort of purchase quantity of $50 to ensure of which discounts requiring this minimum were applied correctly.
Just Beneath Minimum: Attempted a purchase of $49. 99 to confirm that discounts demanding at least $50 are not erroneously utilized.
Threshold Boundary Test: Tested with purchase levels of $100 and $200 to confirm correct discount applications at these important thresholds.
Just Over Threshold: Conducted testing with amounts involving $100. 01 in addition to $200. 01 to be able to ensure that discounts for amounts just above the thresholds were applied precisely.
Outcome:
The program of BVA uncovered several issues, which include:
Discounts being applied incorrectly for portions just below the minimum required.
Completely wrong discount calculations for amounts exactly on the threshold values as a result of rounding errors.
They resolved these concerns, resulting in accurate discount applications and enhanced customer trust.
Case Study 3: Health and fitness Care System – Patient Age Verification
Background:
A healthcare system included a feature to verify affected person eligibility for particular services based about age. Eligibility criteria included minimum and maximum age limits for specific solutions.
Application of BVA:
The testing team utilized BVA to test age confirmation by centering on border values related to grow older limits. Key border values included:
Bare minimum age requirement (e. g., 18 years).
Maximum age limit (e. g., sixty-five years).
Test Cases:
Minimum Age Boundary Test: Tested with patients aged 16 to ensure of which the machine correctly allows entry to services with regard to individuals meeting the minimum age necessity.
Just Below Bare minimum: Tested with sufferers aged 17 to be able to verify that entry to age-restricted solutions was correctly rejected.
Maximum Age Border Test: Tested using patients aged sixty five to ensure the technique correctly handles the upper age restrict for service membership and enrollment.
Just Above Maximum: Tested with patients aged 66 to validate that access was correctly denied beyond the maximum age limit.
Outcome:
The application regarding BVA revealed issues like:
Inconsistent coping with old limits leading to incorrect membership decisions.
Errors inside age boundary measurements affecting service gain access to for patients near the age limitations.
These issues were addressed, enhancing typically the accuracy of age-based service eligibility and ensuring compliance with healthcare regulations.
Case Study 4: Travel Booking System – Booking Date Validation
Background:
A journey booking system involved features for arranging flights, hotels, and rental cars. A single critical functionality was going to validate booking dates based on availability and restrictions.
Application of BVA:
The testing team used BVA to test out date validation by simply centering on boundary principles linked to booking schedules. Key boundary beliefs included:
Minimum reserving lead time (e. g., 1 day).
Maximum booking guide time (e. h., 365 days).
Test Scenarios:
Minimum Reservation Date Boundary Test out: Tested with some sort of booking request accurately 1 day beforehand to ensure of which the system enables bookings with the minimum lead time.
Slightly below Minimum: Experimented with a booking ask for for the identical working day to verify that it was properly rejected if typically the system required with least 1 working day advance notice.
Optimum Booking Date Boundary Test: Tested along with a booking demand for 365 days and nights beforehand to confirm that the system handles the ideal allowed reservation lead time.
Merely Above Maximum: Tested which has a booking request for three hundred and sixty six days in advance to make sure that it absolutely was correctly rejected beyond typically the maximum allowed lead time.
Outcome:
Using BVA helped identify:
Incorrect handling regarding booking dates just beneath and above the allowed boundaries.
Bonuses with system common sense that triggered wrong acceptance or rejection of bookings dependent on the prospect time.
These problems were fixed, bettering the booking procedure and client satisfaction.
Summary
Boundary Value Examination is a highly effective technique in software program testing that assists identify critical problems with the edges associated with input ranges. The case studies offered illustrate how BVA can be effectively applied across numerous domains, from banking and e-commerce to be able to health care and travel. By concentrating on boundary beliefs, testing teams can easily uncover defects that might be skipped along with other methods, major to more reliable in addition to high-quality software. Prosperous application of BVA not only boosts the accuracy associated with testing but also adds to better end user experiences and technique performance