Table 2.

The perceived value of smart PSS

Scope	Aspects	Perceived value	Definition	References
Benefit	Extrinsic and cognitive benefit	Usefulness	Usefulness is the degree of improvement in the use of product performance after using the smart PSS	Chong et al. (2012), Davis (1989), Kim et al. (2007), Kim et al. (2017), Yu et al. (2019)
		Flexibility	Flexibility is the smart PSS which handles dynamic users’ needs by reconfiguration	de Moura Leite et al. (2020), Lapierre (2000)
	Intrinsic and affective benefit	Reliability	Reliability is the accuracy, safety, and traceability of the smart PSS during usage	Lapierre (2000)
Sacrifice	Monetary sacrifice	Fee	Fee is the reasonableness and fairness of the relevant price of the smart PSS	Chong et al. (2012), Kim et al. (2007), Kim et al. (2017), Lapierre (2000), Yu et al. (2019)
	Non-monetary sacrifice	Technicality	Technicality is the difficulty of using smart PSS caused by technologies	Kim et al. (2007), Kim et al. (2017), Lee and Leonas (2020), Wang and Wang (2010), Yu et al. (2019)