This question's explanation and your answers so far.
A 社は B 社に対してハウジングサービスを提供している。A 社と B 社の役割分担として適切なものはどれか。
| サーバなどの機器の所有 | 機器の設置施設の所有 | アプリケーションソフトウェアの開発 | システムの運用 | |
|---|---|---|---|---|
| ア | A社 | A社 | A社 | A社 |
| サーバなどの機器の所有 | 機器の設置施設の所有 | アプリケーションソフトウェアの開発 | システムの運用 | |
|---|---|---|---|---|
| イ | A社 | A社 | B社 | B社 |
| サーバなどの機器の所有 | 機器の設置施設の所有 | アプリケーションソフトウェアの開発 | システムの運用 | |
|---|---|---|---|---|
| ウ | B社 | A社 | B社 | B社 |
| サーバなどの機器の所有 | 機器の設置施設の所有 | アプリケーションソフトウェアの開発 | システムの運用 | |
|---|---|---|---|---|
| エ | B社 | B社 | A社 | A社 |
Here Company A handles everything: ownership of the equipment, ownership of the facility, application development, and operation. That is closer to ASP / SaaS, where the customer uses a finished system or service as a whole, or to full outsourcing of the entire system. It is the exact opposite of colocation, in which the customer brings in its own equipment.
Here Company A owns both the servers and other equipment and the installation facility, while Company B only develops and operates. A provider lending its own servers to a customer is a hosting service (a rental server), not colocation. The difference between housing and hosting is whether the equipment is owned by the customer or by the provider, and this option is wrong because the equipment is owned by Company A.
正解 A colocation service (housing) is a service in which the provider rents out installation space in its own data center or similar facility, and takes in the customer's servers and other equipment to install and run them there. What the provider supplies is the installation environment — building, racks, power, air conditioning, and communication lines — plus management of that facility; the equipment itself remains the customer's own asset. In this question the provider is Company A and the user is Company B, so only “ownership of the equipment installation facility” belongs to Company A, while “ownership of equipment such as servers” belongs to Company B. In addition, development of the application software that runs on that equipment and operation of the system are both carried out by Company B itself, the owner of the equipment. The combination Company B / Company A / Company B / Company B, namely ウ, is therefore appropriate.
Here Company B owns both the equipment and the installation facility, and Company A takes on development and operation. That is an outsourcing arrangement in which only development and operation are contracted out on the premise that the customer already has the equipment, and it conflicts with the essence of colocation, where Company A supplies the space. Once the facility is owned by Company B, there is nothing left for Company A to provide as a service.