olemus
Investopedia:
The support stage involves providing ongoing support to customers after they have purchased the product. This includes customer service, warranties, and repairs. This may also relate to ongoing trainings or services provided to new owners to better enhance their user experience (i.e. tutorials on how to use their new technology).

standardid
ISO/IEC/IEEE 24748-1:2018
Systems and software engineering — Life cycle management — Part 1: Guidelines for life cycle management