Case Studies: Successful Using Boundary Value Research in Real Projects

Boundary Value Analysis (BVA) is a crucial technique in application testing that allows identify errors in the boundaries regarding input values. This approach is based in the principle that will errors are more likely to take place at the sides of input varies as opposed to within typically the ranges themselves. Inside this article, we will explore several case studies presenting the successful program of BVA inside real projects across various domains. These types of examples illustrate exactly how BVA can improve testing efficiency, find out critical defects, and even improve overall software quality.

Case Study 1: Banking Application – Account Stability Validation
Background:
Some sort of major bank seemed to be developing an online banking application using features for taking care of account balances, copying funds, and producing statements. One involving the critical functionalities was to confirm transactions based in account balance restrictions. For instance, selected transactions were restricted depending on whether the particular balance was beneath or above some sort of specific threshold.

Application of BVA:
The screening team used BVA to focus on boundary values for account bills. They identified important boundary values this sort of as:

The lowest allowed balance (e. g., $0).
The threshold balance intended for transactions (e. g., $100).
The maximum permitted balance to the account.
Test Scenarios:

Lowest Boundary Test: Attempted a transaction along with an account stability of $0. Typically the system should effectively handle cases exactly where the balance is definitely zero and guarantee transactions do certainly not proceed.
Just Above Minimum: Tested together with a balance regarding $1 to assure that transactions just above the minimal threshold are highly processed correctly.
Threshold Border Test: Conducted tests with balances exactly at the $100 threshold to assure correct handling regarding transactions at this reduce.
Just Above Tolerance: Tested using a stability of $101 in order to verify that transactions above the tolerance are processed needlessly to say.
Maximum Boundary Check: Validated the system together with the maximum permitted balance to assure it handles upper limits appropriately.
Final result:
By applying BVA, the team discovered several defects, including:

Incorrect handling involving transactions when the particular balance was accurately $0, leading to unsuccessful transactions that should possess been allowed.
Difficulties with transactions at the $100 threshold due to off-by-one mistakes in the validation logic.
These studies were addressed, resulting in improved system dependability and customer pleasure.

Case Study 2: Ecommerce Platform – Discount Code Application
Background:
An e-commerce system offered various low cost codes that might be utilized at checkout. The particular discount system experienced multiple rules structured on the overall purchase amount, like minimum purchase specifications for several discounts.

Application of BVA:
The particular testing team utilized BVA to analyze the use of discount codes by centering on border values with the buy amounts. Key border values included:

Lowest purchase amount needed for discounts (e. g., $50).
Tolerance amounts for various discount levels (e. g., $100, $200).

Test Scenarios:

Minimum Purchase Boundary Analyze: Tested with some sort of purchase quantity of $50 to ensure that will discounts requiring this kind of minimum were utilized correctly.
Just Under Minimum: Attempted a new purchase of $49. 99 to validate that discounts demanding at least $50 were not erroneously applied.
Threshold Boundary Analyze: Tested with purchase amounts of $100 and $200 to validate correct discount applications at these important thresholds.
Just Above Threshold: Conducted checks with amounts associated with $100. 01 in addition to $200. 01 in order to ensure that discount rates for amounts merely above the thresholds were applied effectively.
Outcome:
The app of BVA revealed several issues, including:

Discounts being applied incorrectly for portions just below typically the minimum required.
Completely wrong discount calculations with regard to amounts exactly at the threshold values as a result of rounding errors.
The team resolved these problems, causing accurate discount applications and increased customer trust.

Circumstance Study 3: Wellness Care System – Patient Age Confirmation
Background:
A healthcare system included a feature to verify individual eligibility for particular services based in age. Eligibility requirements included minimum plus maximum age limitations for specific services.

Application of BVA:
The testing staff utilized BVA to be able to test age verification by centering on boundary values linked to age limits. Key border values included:

Lowest age requirement (e. g., 18 years).
Maximum age reduce (e. g., sixty five years).
Test Cases:

Minimum Age Boundary Test: Tested along with patients aged eighteen to ensure of which the machine correctly allows access to services intended for individuals meeting the minimum age necessity.
Just Below Minimal: Tested with people aged 17 to be able to verify that entry to age-restricted solutions was correctly denied.
Maximum Age Border Test: Tested with patients aged sixty five to ensure the system correctly handles the upper age restrict for service eligibility.
Just Above Optimum: Tested with individuals aged 66 in order to validate that gain access to was correctly refused beyond the optimum age limit.
Result:
The application of BVA revealed problems for example:

Inconsistent handling old limits major to incorrect membership decisions.
Errors throughout age boundary measurements affecting service accessibility for patients around the age limits.
These issues have been addressed, enhancing the accuracy of age-based service eligibility and even ensuring compliance along with healthcare regulations.

Situation Study 4: Vacation Booking System – Booking Date Validation
Background:
A travel booking system involved features for arranging flights, hotels, and rental cars. A single critical functionality was to validate booking date ranges based on accessibility and restrictions.

Application of BVA:
Typically the testing team applied BVA to analyze date validation by simply centering on boundary values relevant to booking dates. Key boundary principles included:

Minimum reserving lead time (e. g., 1 day).
Maximum booking business lead time (e. gary the gadget guy., 365 days).
Test Scenarios:

Minimum Booking Date Boundary Test out: Tested with a new booking request precisely 1 day in advance to ensure that the system permits bookings with typically the minimum lead moment.
Just beneath Minimum: Experimented with a booking obtain for a similar working day to verify that will it was properly rejected if typically the system required from least 1 time advance notice.
Maximum Booking Date Boundary Test: Tested with a booking ask for for 365 days before hand to confirm that this system manages the ideal allowed reserving lead time.
Simply Above Maximum: Tested having a booking request for three hundred and sixty six days within advance to make sure that it had been correctly rejected beyond the maximum allowed guide time.
Outcome:
Using BVA helped identify:

Incorrect handling associated with booking dates just beneath and above typically the allowed boundaries.
Problems with system reasoning that led to erroneous acceptance or denial of bookings structured on the business lead time.
These concerns were fixed, improving the booking method and client satisfaction.

Bottom line
Boundary Value Examination is a highly effective technique in application testing that assists identify critical problems in the edges associated with input ranges. Typically the case studies offered illustrate how BVA can be properly applied across several domains, from banking and e-commerce to be able to health care in addition to travel. By focusing on boundary values, testing teams can easily uncover defects that might be overlooked to methods, primary to more reliable and even high-quality software. Productive application of BVA not only boosts the accuracy of testing but in addition has contributed to better consumer experiences and method performance