Service Level Agreement

Service level agreement/the agreement/service quality guarantee contract regarding service level

Including the rule when it cannot achieve that the purveyor of service (the provider) with the service bailor (the customer) with the occasion where it makes a contract in between, contents of the service which is offered and the request for the range and quality (the achievement) with level as clear, agree beforehand. Or that the to express statement it is the document and the contract which are converted.

As for service contents understand in comparison with the product which has the physical substance and whether the and others between the contributor and the bailor something which it is done the possibility the criss cross of the recognition regarding occurring is high. Especially, in case of the service which is offered over middle long term, "first it was good, but quality went down gradually", "when it is good, if it is, when it is bad, it is", you question and the ? callouses are not few. Then, what by the fact that service level explicit is defined quantitatively with numerical value, removes "the ambiguity" concerning the location of role and responsibility, decides rule is SLA.

As for the standard of SLA, if it is not the numerical value which can be measured with objective method, there is no effect. If it is the service which covers middle long term, the ? does not become not to be the standard whichmeasurement (monitoring) it is possible periodically, concerning measuring method and the subject which measures in SLA describes.

With SLA, as a compensation of the payment for the bailor whether some kind of service just which it is offered it becomes in advance clear, considers the balance of function and cost and it becomes possible to select optimum service. On the one hand, for the contributor it prevents the fact that (you express in harmony make English and) are required the quality above "servicing" and supposition, it is possible to be able to point to the cost structure of business clearly. In addition, the group of person in charge enterprises cooperating, when service it relates to offer, SLA with OLA and UC becomes importantthoughtin orderto make the location of responsibility clear.

Originally the common carrier communication quality of network service (QoS: Being something which spread the Quality of Service) as the contract form which does in order to guarantee, contents it provides standard in regard to the lower limit of effective data rate and the upper limit etc. of downtime of the time of obstacle, the specification transitable (calls bleach and the like) the penal regulations and compensation when is (example: Reduction of utilization fee) and the like it was stipulated. This in order around the nineties latter half, Internet at the time when it is it reaching the point where it is used as the basis of enterprise and society, to guarantee the quality of Internet connection service which was offered with best effort, was something which is adopted. Presently extremely it is prepared generally as a service menu of network connection service for the corporate body.

At today, at the time of services other than communication servicing it is designed in such a way that it is used,of data center and the like, SLA is spreading to also maintenance services and the like which begin the maintenance of OA equipment such as operationalconservativeout-sorcing of online application service and the enterprise information system like ASP and the net stock company and furthermore copy machine. In addition, information system section inside enterprise (the purveyor of service) with user section (the service bailor) also the example which adopts the concept of SLA in between is seen. Furthermoreat the time ofcontinuous system developing such as Agile software development, there are times when the software quality assurance with SLA is included in contract.

The aforementioned way SLA it keeps exchanging simply when making a contract, continuous monitoring is important. In addition, when SLA is drawn up, it is difficult, to obtain optimum SLA, from first for trust side/offer side SLA which it concludes continuous it is desirable to take a second look periodically. Such activityis calledSLM.

The English government collected the best practice of service management IT,in"ITIL ", SLA is handled service support (daily use) with service delivery (medium long-term improvement) as the important tool which is tied. With ITIL, the customer and the user are distinguished, the service provider concludes customer and SLA, has meant to offer service to the user according to the contents.