downtime costs

Next to that, there should be taken a look at recurring costs like maintenance costs and downtime costs.

This includes their initial purchase cost, along with other factors such as maintenance costs, downtime costs (if there's a breakdown) and the cost of consumables and disposal.

System z servers are used by IBM customers for business-critical installations in medium and large organizations which need very high availability, where scheduled and unscheduled downtime costs are high, and at traditional "mainframe shops" such as banks and insurance companies which already have mainframe applications at the center of their business processes.