What is boundary value analysis?

Best Manual Testing Course Institute in Hyderabad

When it comes to launching a career in software testing, choosing the right training institute makes all the difference. Quality Thought stands tall as the best manual testing training course institute in Hyderabad, especially for those seeking hands-on experience, industry mentorship, and career transformation support.

Whether you are a graduate, postgraduate, a professional with an education gap, or planning a career switch from a different domain, Quality Thought offers a tailor-made learning experience designed to suit your goals. Its standout feature is a live intensive internship program guided by top industry experts, making it one of the most sought-after training destinations for aspiring testers in Hyderabad, including the bustling tech training hub of Ameerpet.

Key Idea

Most errors in a program occur at the edges of input ranges—right at the minimum, maximum, or just inside/outside these limits.
Instead of testing many random values, you test at, just below, and just above the boundaries.

Example

If a system accepts input between 1 and 100:

  • Lower boundary: 1

  • Upper boundary: 100
    You would test:

  • Just below the lower boundary → 0 (Invalid)

  • Exactly at the lower boundary → 1 (Valid)

  • Just above the lower boundary → 2 (Valid)

  • Just below the upper boundary → 99 (Valid)

  • Exactly at the upper boundary → 100 (Valid)

  • Just above the upper boundary → 101 (Invalid)

Benefits

  • Reduces the number of test cases needed

  • High chance of detecting edge-case bugs

  • Works well with numeric and range-based inputs

When to Use

  • Forms with min/max limits (age, price, quantity)

  • Ranges in date pickers or score systems

  • Any scenario where inputs fall within a continuous range

Read More:

What is the difference between a bug, defect, and error?

What is the Software Testing Life Cycle (STLC)?

How do you write an effective test case?

What are the responsibilities of a manual tester in a software development team?

What is a test case?

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