Learn in the textbookCloud Deployment Models and Operation Models
DefinitionOn-premises (オンプレミス) is a model in which information system equipment is installed at a site the company manages and run by the company itself.
ExplanationIt is the approach used since before the cloud spread, and it serves as the baseline when comparing cloud models. Because the company prepares and manages the equipment, it can decide the configuration and security measures on its own. In exchange, the company has to provide the purchase cost, the installation space and the staff for maintenance.
AnalogyLiving in a home you own instead of renting. You can change the layout freely, but the purchase price and repairs are all on you.
Memory hook"Premises" means a building and its grounds, so on-premises reads as "on the company's own grounds."