Haas concepts include the provision and installation of hardware, its maintenance and monitoring, replacement with newer models and disposal of the hardware in return for a fixed monthly leasing fee. In such a HaaS concept, the responsibilities of the two contracting parties are specified in detail in a service level agreement( SLA).
An example of such a hardware offering is PC as a Service( PCaaS). A comparable model is Device as a Service( DaaS). The HAAS or DaaS concept has the advantages for the user that no investment costs are incurred and he does not have to worry about maintaining the devices.