How to choose a bug management tool?

In order to evaluate and find a good bug management tool you must first understand and relate specific technical features of various bug management tools to your requirements and compare them with your old bug tracking process.

What is a bug management tool?

Bug management tools are software applications that help users working on software development projects keep track of bugs. They are usually integrated with application lifecycle management systems, as a necessary component of a software development infrastructure.
The system is usually made up of a database where details about bugs are recorded and a bug life cycle management that allows users to bring status changes from the moment the bug is discovered to the moment it gets deleted.
Bug management tools can limit the time it usually takes for a bug to get fixed, this tools can inform software development teams about the exact time a bug has been recorded. The odd behavior of the program caused by the bug and how many programmers work on fixing the problem at a given moment.

Meeting your bug tracking requirements
Bug management tools influence business critical decisions such as how to assign work to programmers, which bugs to urge or defer, and whether the release date of a project needs to be pushed back or not.
To ensure that you have chosen the right tool for your company, you need to establish your requirements first and compare them with the list of technical system features. Depending on your needs and work habits, you can identify and prioritize different system features.
If you require providing different levels of access to users based on their status in the company. And you will need to find a bug tacking tool that offers field-level, bug-level, feature-level and project-level permissions.

Application lifecycle management systems
Adaptability is an important feature of any software application. Software development teams usually require a tool that can support various activities, because a system that was created specifically for bug management is hard to implement and adapt.
This is why you should be looking for software that integrates bug management in a larger and more complex system such as an application lifecycle management system.

Ease-of-use is must when choosing a bug management tool
The primary role of a bug management system is to streamline the bug tracking and solving process. This is why ease-of-use is important when it comes to choosing the right type of tool.

Easy-of-use plays a crucial role when several people are working on a bug and need to work efficiently while collaborating with each other. Make sure the interface of the tool you choose is intuitive and easy to operate.

Based on the above, I recommend a free and open source project management software named ZenTao, which include bug management meet your demand.