Full Description Scope This document establishes a common process and framework for measurement of systems and software. It defines a process and associated terminology from an engineering viewpoint. The process can be applied to the project and products across the life cycle. The measurement process can be applied throughout the life cycle to aid the planning, managing, assessing, and decision-making in all stages of a system or software life cycle.

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The assessor validates this data to ensure it is accurate and completely covers the assessment scope. Process rating requires some exercising of expert judgment on the part of the assessor and this is the reason that there are requirements on assessor qualifications and competency. The process rating is then presented as a preliminary finding to the sponsor and preferably also to the persons assessed to ensure that they agree that the assessment is accurate.

In a few cases, there may be feedback requiring further assessment before a final process rating is made. This is an elaboration of the process reference model PRM provided by the process lifecycle standards. Tools used in the assessment[ edit ] There exist several assessment tools.

The simplest comprise paper-based tools. In general, they are laid out to incorporate the assessment model indicators, including the base practice indicators and generic practice indicators.

Assessors write down the assessment results and notes supporting the assessment judgment. There are a limited number of computer based tools that present the indicators and allow users to enter the assessment judgment and notes in formatted screens, as well as automate the collated assessment result i.

Assessor qualifications and competency[ edit ] For a successful assessment, the assessor must have a suitable level of the relevant skills and experience.

These skills include: personal qualities such as communication skills. The competent lead assessor defines when the assessment is successfully performed. There exist schemes for certifying assessors and guiding lead assessors in making this judgement. It specifies requirements for improvement programmes and provides guidance on planning and executing improvements, including a description of an eight step improvement programme.

Following this improvement programme is not mandatory and several alternative improvement programmes exist. Target process profiles are particularly important in contexts where the organization for example, a government department is required to accept the cheapest qualifying vendor. This also enables suppliers to identify gaps between their current capability and the level required by a potential customer, and to undertake improvement to achieve the contract requirements i.

Work on extending the value of capability determination includes a method called Practical Process Profiles - which uses risk as the determining factor in setting target process profiles. It has the support of the international community. Over 4, assessments have been performed to date. Major sectors are leading the pace such as automotive, space and medical systems with industry relevant variants.

There have been many international initiatives to support take-up such as SPiCE for small and very small entities. In addition there are methods available that adapt its use to various contexts.


ISO/IEC/IEEE 15939:2017

As a result of balloting in ISO, the statement of scope was modified as follows: "This standard describes a process for the management of risk during systems or software acquisition, supply, development, operations, and maintenance. P - IEEE Draft International Standard - Systems and Software Engineering -- Systems and Software Assurance -- Part 4: Assurance in the Life Cycle This document provides guidance and recommendations for assurance of a selected claim about the system-of-interest by achieving the claim and showing the achievement. These relations are demonstrated by means of mapping tables that show relationships between activities and tasks, and process outcomes. This mapping assists users of the edition to transition to using the edition. These process activities and tasks can be applied iteratively. P - Software Engineering - Software Life Cycle Processes - Maintenance This standard describes an iterative process for managing and executing software maintenance activities.


ISO/IEC 15504


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