Uncontrollable Quality Attribute
by
Osama Sammodi
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last modified
Apr 27, 2012 10:37
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filed under:
KnowledgeModel
Definitions
Term: Uncontrollable Quality Attribute |
Domain: Cross-cutting issues | ||||
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Engineering and Design (KM-ED) |
Adaptation and Monitoring (KM-AM) |
Quality Definition, Negotiation and
Assurance (KM-QA) |
Generic (domain independent) |
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D o m a i n : L a y e r s |
Business Process Management (KM-BPM) |
The term is strictly connected to "Upper and Lower Control Limits". These limits are the acceptable range of variation of a process. They are often shown as two dashed lines on a control chart. Every process is expected to have some variation (each door manufactured will not be exactly the same size). The acceptable range of measurements between the upper and lower control limits is set by the project manager and stakeholders based on the organization's quality standard. Normally this range is calculated based on +/- 3 sigma, or standard deviations. Data points within this range are generally thought of as "in control," excluding the "rule of seven", and are an acceptable range of variation. Data points outside this range mean the process is out of control. The concept of control limits is also important outside -of a control chart. [Mulcahy, 2011] | |||
Service Composition and
Coordination (KM-SC) |
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Service Infrastructure (KM-SI) |
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Generic (domain independent) |
Uncontrollable quality attributes (e.g. network latency) are those that cannot be controlled by the service provider and may affect the quality of the offered service. [CD-JRA-1.3.3] |
References
- [CD-JRA-1.3.3] "Initial Concepts for Specifying End-to-End Quality Characteristics and Negotiating SLAs"
- [Mulcahy, 2011] Rita Mulcahy: PMP Exam Prep, Seventh Edition: Rita's Course in a Book for Passing the PMP Exam, RMC Publications; Seventh edition, 2011.