Test Process is the planning activity to test the application software.
Bellow are the best practices for Test Process Improvement

Increase quality - In today's time software has become an intrinsic part not only in business sector but in every sector. While the complexity and pervasiveness of software systems continues to grow whereas customer's tolerance for problems is declining day by day. These trends have made software testing critically important to many organizations and test teams are constantly under the gun to improve their effectiveness.

Reduce risk - Deploying low quality tested software constitutes a very high risk to an organization. Defectiveness of the software can lead a loss of business, repair costs, loss of market reputation and fines. growing software has also caught the attention of regulators.

Reduce schedule and cost - as companies need to keep the cost of testing and release schedules under control. With software testing representing 25 to 50% of the development cost on average, and testing on the critical path of every development planning, investing in a more efficient testing process is definitely money well spent.

Improve project transparency and control - As your test maturity grows, test deliverable's improve. Improvements in test planning provide a solid baseline against which progress can be tracked, while improved metrics provide objective by insight in the true state of the test project and the quality of the software under test allows management to make better informed decisions and steer the project to successful completion.