Lean is about creating the most value for the customer while minimizing resources, time, energy, and effort.

Software Development Processs
Agile software experts tend to describe phase gate processes as obsolete or inherently “waterfall” and therefore evil — but this is more a reflection of how poorly the Agile coach understands the nature of product development outside of software.
There are 4 key types of maintenance management strategies including run-to-failure maintenance, preventive maintenance, predictive maintenance, and reliability-centered maintenance. These maintenance management strategies can be used together, or independently.
Agile Testing is a fast and informal testing process. In simple terms, we can say that it is specified as an advanced and dynamic type of Testing that is performed regularly throughout every iteration of the SDLC (Software Development Life Cycle) by the agile test engineers
Principle #8: Agile processes promote sustainable development. The sponsors, developers, and users should be able to maintain a constant pace indefinitely.
What is software sustaining engineer?Sustaining Engineering is a critical team that handles the most difficult customer escalations, resolving software bugs, code defects and other issues, from the kernel all the way up to the highest levels of the open source stack.