A best practice is a method or technique that has consistently shown results superior to those achieved with other means, and that is used as a benchmark.
A best practice is a marketing term for some idea that consultants find saleable.
Examples of Best Practices:
PRINCE2, Agile (preferably without product owner), TMAP, BISL, ALS, ITIL, Waterfall, Systems Engineering, JSTD-016……so-called “best practices”. Ohh <“shocked consultant”> are you not using <name best practice>? Here is the magic bullet….<name best practice>. Nothing can go wrong anymore.
(shouting, screaming) CONTEXT! Please, reframe Best into good practice, and you will increase your chance of success. It ALWAYS depends on CONTEXT.