Answer.

Background:

In the early stages of testing, bugs were often fixed without systematization. As software became more complex, with an increasing number of tasks and bug trackers, the need for proper prioritization arose — so that resources were spent first and foremost on critical issues, rather than insignificant ones.

Issue:

Without prioritization, testers, managers, and developers may waste time on minor bugs, overlooking critical errors that could lead to financial or reputational losses, or product failures.

Solution:

Implementing a priority level system:

Bug priorities are divided into "Critical", "High", "Medium", "Low" (or similar levels)
Priority is determined based on the bug's impact on the business, users, and the system as a whole
In large teams, this is done collaboratively with the product manager

Key features:

Saving time and resources by focusing on the most important defects for the business
Preventing conflicts between the QA team, development, and business
Flexible reassessment of priorities as the situation changes

Trick Questions.

What does the priority of a bug depend on — the severity of the defect or business priorities?

On both factors. There are bugs with minor technical severity, but critical for the business (e.g., an error in the product price on the payment page).

Should all bugs with the same severity have the same priority?

No, it's important to consider the context of use, frequency of occurrence, and the impact on key business metrics.

Can the priority of a bug change over time?

Yes, as the project develops, release plans change, new requirements emerge, or user feedback is received, priorities can shift.

Typical Mistakes and Anti-Patterns

Assigning a high priority uniformly to all bugs
Discussing priority only within QA without involving PO/business
Ignoring bugs with "low" priority that are actually critical

Real-Life Example

Negative Case

On an e-commerce site, minor visual bugs were assigned maximum priority in the bug tracker, while issues related to payment integration failures were assigned minimum priority.

Pros:

Quick fixes for the attractive outer part of the site

Cons:

Revenue losses due to non-functional payments, despite the "perfect appearance" of the store.

Positive Case

In the team, priorities were determined collaboratively: bugs that hindered payment and the operation of vitally important functionality were marked as "Critical" and addressed first.