Table 2.

Research questions

ID	Research Question
RQ1	In which publication venues are studies about the use of machine learning for mechanical fault detection and fault prognosis in manufacturing equipment published?
RQ2	In which scientific fields has the use of machine learning for mechanical fault detection and fault prognosis in manufacturing equipment been researched?
RQ3	What machine learning algorithms and methods are currently employed for mechanical fault detection and fault prognosis in manufacturing equipment?
RQ4	What limitations and advantages do those algorithms and methods present?
RQ5	Which of those algorithms and methods are used for data stream learning?