Property:Availability

Informational

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		Availability	Version:	0.1
	Document type:	Quality Attribute	Owner:	J.A.H. Schoonderbeek

A facility's/products Availability, denoted as a single string, determines to what degree a facility/product is functioning correctly, and is able to provide sufficient capacity to handle requested use in a timely fashion (within pre-defined service windows). In general, the more robust a facility of product is built, the higher the degree of availability that can be guaranteed. The most common practices in enhancing robustness are the use of redundant components to construct a facility, and/or using a redundant set of facilities to construct a product.

Defined values for Availability:

ordinal	value	meaning
0	NS	no availability specified
10	Best-Effort	the operation of a facility/solution is not safe-guarded against incidents and disasters
20	Medium	the operation of a facility/solution is unaffected by incidents
30	High	the operation of a facility/solution is unaffected by incidents and disasters

The table below provides an overview of these classes and the provisions that should be made to get a facility or Product in a certain class:

Provision	Best-Effort	Medium	High
Single facility/solution, on a single location	√	X	X
Redundant or highly resilient facility/solution, on a single location	√	√	X
Redundant facility/solution, on two or more locations	X	√	√
Fail-over	none	manual, active-passive	automatic, active-active

UsageConstraint schema

previous 20 20 50 100 250 500 next 20

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Showing 20 pages using this property.

A

Availability Best-Effort +

Best-Effort +

Availability High +

High +

Availability Medium +

Medium +

B

BV.Application Engine.Cloud - Internal Use Best Effort +

Best-Effort +

BV.Application Platform.SAP ABAP +

Medium +

BV.Application Platform.SAP ABAP+JAVA +

Medium +

BV.Application Platform.SAP JAVA +

Medium +

BV.Control Interface.Cloud Platforms +

High +

BV.Deployment.SAP +

Medium +

BV.Identity Validation.DMZ +

High +

BV.Identity Validation.SAP +

High +

BV.Interconnection.SAP +

Best-Effort +

BV.Permission Validation.DMZ +

High +

BV.Permission Validation.SAP +

Medium +

BV.Presentation Aggregation.Cloud Portal - Internal Use +

High +

BV.Presentation Engine.Integrated Tablet +

NS +

BV.Presentation.Cloud - Internal Use +

Best-Effort +

BV.Receipt Printer +

Medium +

BV.Session Endpoint.SAP Router +

Medium +

BV.Traffic Filtering.Internet Perimeter +

High +

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    "constraints": {
        "type_constraint": "_txt",
        "allowed_values": [
            "NS",
            "Best-Effort",
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Property:Availability

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