Used aircraft, replacement engines, spare parts, maintenance and service contracts It is therefore not certain that it is considered a supply or service contract. Another term related to ALS is the service level statement, in which there is no actual counterparty on the customer site. These may include, for example, public transport regulations. The Service Level Agreement (SLA) is a term that refers to an intermediate contract negotiated between a service provider and its user. Most of the time, ALS is in the IT sector, but it is not always a condition. The Itil methodology addresses the issue of IT services in a wide range of areas. Each sale (making available) of a product (software, service, product,…) is done at the same time as the definition of that product. This definition should set clear rules for users and manufacturers on how the product can be maintained, how it can be used and how to use it. For example, there is a guarantee on the product, the normal use of the product, what the product is intended for, how much the product costs …

In addition to ALS, the concept of an Operating Level Agreement (OLA) is also important, which in fact means the same thing as ALS, but it is concentrated within the organization that provides the operation of the service. It is therefore a contract between the salesmen of the service and the technicians who ensure its operation. Service Level Agreement (SLA) is a formalized service description that the provider makes available to the customer. In particular, the service level agreement defines important parameters such as the circumference, level and quality of service. It is also important that the Commission be informed of the planned negotiations on new service agreements. Service Level Management is one of the key elements of overall service management. This term is closely related to Service Level Management (SLM), which includes monitoring and quality of service management on the basis of defined quality indicators (described in the service level agreement) that are part of the organization`s core performance indicators. The agreement on the level of services provided also describes how customer support is addressed, the channels of communication between the customer and the supplier, how to deal with exceptional or emergency conditions, the speed of response and repair of the fault, the determination of liability for the damages, the repair of intellectual and copyright rights and others.