QA Tester vs. QA Engineer vs. QA Architect

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QA Tester QA Engineer QA Architect
Function – Strong in test execution. Function – Test planning, Test Design and execution. Function – Define approach to test entire systems
Write and execute test cases – may not be coverage driven. Requirements driven testing. Prepare test plans, develop test cases and execute tests with a focus on coverage. Design, plan, execute, monitor, improve testing process for a testing engagement.
Determines Quality. Good to answer – did you find any bugs? Engineers Quality. Good to answer – what is the quality of the product? Provides answers to – 

  • What are the quality attributes and goals of the product?
  • What should be the test strategy, methodology and test tools so as to ensure product quality?
Linear thinkers, low capability of analysis and re-usability of efforts/resources. Logical thinkers. Ability to resolve issues using abstraction. Capability in analysis/predictions/improvements. Analytical and creative. Systems thinking and quantitative/statistical thinking capabilities.
Requires a defined environment. Typically are weak in finding solutions in ambiguous/constrained environments. Can reconcile conflicting constraints. Able to define the environment.
Low process oriented capability. Process and metrics/measurement driven. Defines standards, guidelines, methodologies, metrics.
May not be cost sensitive (time, effort, monetary, etc.) Cost sensitive Cost sensitive
Good for UI Testing 

  • Regression testing
  • Portability testing
Good for System/functionality testing 

  • Performance testing /Automation
  • Independent validations
  • Domain testing
  • Programming skills orientation
Good for defining, planning and managing for test engagements.
   
  • Ability to understand the goals of an organization and suggest a test architecture.
  • Able to suggest alternative approaches and benefits of the same.
  • Ability to suggest improvements to process and technology areas for a test system.
  • Ability to define the framework for testing.
  • Ability to analyze risks and provide mitigation plans.
  • Ability to analyze test requirements and provide a solution in terms of test approach and design, suggested tools etc.
  • ability to design the entire test life cycle processes.
  • Capability to lead and co-ordinate a team of analysts for testing engagements.
  • Software development skills.
  • In touch with new methodologies and tools for software testing.
  • Ability to design, plan and execute and monitor a testing process.
Typical involvement is in later stage of SDLC Best to have them involved in complete SDLC Cycle. Best to have them involved in complete SDLC Cycle.

Source: http://manishrathi.com/2009/09/11/qa-tester-vs-qa-engineer-vs-qa-architect/

Instrumentation Best Practices for High Performance BizTalk Solutions

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The traditional ways of instrumenting BizTalk solutions may not always be the most effective from a performance standpoint. The commonly used instrumentation and tracing components leveraging the Win32 Debugging APIs may introduce a potential bottleneck and become responsible for performance degradations in multi-threaded BizTalk applications running under stress.

From the other side, source code instrumentation delivers a great degree of visibility into the application behavior and helps reduce the overall troubleshooting efforts. Consequently, a fundamentally new approach to instrumenting high performance BizTalk solutions has become crucially important to enable collecting the rich and detailed diagnostic information in a non-intrusive manner with virtually no overhead and no impact on the application performance.

The Windows Server AppFabric Customer Advisory Team at Microsoft aimed to provide the community with validated best practices to help BizTalk developers enrich their solutions with the high-performance instrumentation internally adopted by many Microsoft products. These best practices have been reflected in the form of a reusable framework which BizTalk developers can easily plug in and adopt in their own implementations.
Source: http://www.microsoft.com/downloads/en/details.aspx?FamilyID=2785c8bd-c10b-4961-b478-721973d6ccef