Table 5.

Evaluation items of performance and scalability.

Evaluation criteria	Evaluation item
Performance/ scalability (4 items)	(1) Whether or not periodical tests should be used to keep cloud service's performance
	(2) Whether or not periodical tests should be used to keep cloud service's stability
	(3) If cloud service's demand (users, etc.) increases, whether or not there is a method to stably keep the service's performance
	(4) If cloud service's users increase, whether or not that secures the scalability