Reliability engineers may suggest environmental stress tests. There are many types of tests in an RE's toolbox. We compare two types of commonly known tests that are used for design: ALT vs. HALT. What are the important distinctions between these two methods? What value do they each bring to design engineering? And how do they fit into other reliability test methods? Visit the website for additional links, downloads, and a venn diagram. Plus, I link to another fun video.  https://www.qualityduringdesign.com/qdd/ALT-vs-HALT/View the video on YouTubeFurther explore these topics from these other QDD episodes:HALT! Watch out for that weakest link.Results-Driven Decisions, Faster: Accelerated Stress Testing as a Reliability Life TestEnvironmental Stress Testing for Robust DesignsGetting Comfortable with using Reliability Results5 Aspects of Good Reliability Goals and RequirementsSupport the show**FREE RESOURCES**Quality during Design engineering and new product development is actionable. It's also a mindset. Subscribe for consistency, inspiration, and ideas at www.qualityduringdesign.com. About meDianna Deeney helps product designers work with their cross-functional team to reduce concept design time and increase product success, using quality and reliability methods. She consults with businesses to incorporate quality within their product development processes. She also coaches individuals in using Quality during Design for their projects.She founded Quality during Design through her company Deeney Enterprises, LLC. Her vision is a world of products that are easy to use, dependable, and safe – possible by using Quality during Design engineering and product development.