However, in the case of critical services, customers should invest in third-party tools to automatically collect sLA performance data that provide objective performance measurement. A service level contract (or ALS) is the part of a contract that specifically defines the services a service provider will provide and the level or standard required for those services. ALS is generally part of an outsourcing or service management contract or can be used in facilities management agreements and other service delivery agreements. This article is aimed primarily at customers and contains some simple tips for creating effective SLAs. In the following section, the summary of the agreements should contain four elements: the service elements include the characteristics of the services provided (and what is excluded if there is any doubt), the conditions of availability of services, standards such as deadlines for each level of service (prime time and non-prime time, z.B different levels of service), the responsibilities of each party, escalation procedures and cost/service compromises. The SLA metrics required depend on the services provided. Many elements can be monitored as part of an ALS, but the scheme should be kept as simple as possible to avoid confusion and excessive costs on both sides. When selecting metrics, check the process and decide what is most important. The more complex the monitoring scheme (and associated corrective measures) is, the less likely it is to be effective because no one will have time to properly analyze the data. If in doubt, opt for the simple collection of metrics; Automated systems are the best, as expensive manual metric input is unlikely to be reliable. What is an SLA document usually made of? Aspects of the service, including responsibilities, quality and availability, are agreed between the service provider and the user of the service. Therefore, make sure you can deliver the promised product on the promised date.
Before you subscribe to an IT department, ALS must be carefully evaluated and designed to achieve maximum service value from the end-user and business perspective. Service providers should be mindful of the differences between internal spending and client-focused outcomes, which can help define service expectations. FP7 IRMOS also examined aspects of translation of ALS terms at the application level into resource-based attributes to bridge the gap between customer expectations and cloud provider resource management mechanisms.   The European Commission has presented a summary of the results of various ALS research projects (from specifications to monitoring, management and implementation).  Another concrete example of ALS is an agreement on the service level contract of an Internet service provider.