It is very significant to realize what you need from project managers to do your job as a software tester most effectively.
First of all you need to understand what the software product is. The business analysts are answerable for determining and changing the project details, purposes, aims, and design.
You should know that in the ideal conditions the actual accomplishment points should not come from the project management team, but should be left up to the development department.
Project manager will help you take in the target audience (children, students, bookkeepers, travel companies etc.) and in what way this software will be used.
In turn, this knowledge helps you exactly determine the potential issues for software testing and helps you make decisions about which issues should be corrected.
Project management team operates with all the teams (software testing company, software development company) to determine a time-table, but eventually he usually maintains the documents that describe who will be doing what and when.
Software testing will need to be kept updated on that.