The phrase "a number of different methodologies" is correct and usable in written English.
It can be used when discussing various approaches or techniques in a particular field or study.
Example: "In our research, we employed a number of different methodologies to ensure comprehensive results."
Alternatives: "several distinct methodologies" or "various approaches".
Instead, it gathers a hodgepodge of information, using a number of different methodologies, none of which yield comparable results.
To this end, a number of different methodologies have been adapted to tackle the problem.
The five-stage study employed a participative approach using a number of different methodologies to explore the use and design of commonly used cleaning equipment.
There are a number of different methodologies of DOE, therefore, the appropriate methodology depending upon the objective of the test and the resources available, should be selected.
Organisation analysis and improvement techniques have been a field of study for many years with the result that there are a number of different methodologies ranging from purely mathematical models of analysis to heuristic models using simulation.
Organisational Analysis techniques have been a field of study for many years, resulting in the development of a number of different methodologies ranging from purely mathematical models of analysis to heuristic models using simulation.
Accordingly a detailed methodology was constructed based on the integration of a number of different methodological strands from the literature.
Considering its importance, it is not surprising that a large number of different methodologies have been developed to tackle this task.
The group interviews were semi-structured, including some key questions with opportunities for open discussion and utilised a number of different participatory methodologies (Table 5).
Despite the large number of different methodologies for the quantification of organotin species developed in the last two decades, standardised analytical methods at required concentration level do not exist.
A number of different restriction-digest methodologies already existed, using high-throughput sequencers.
