本文介绍两种用于系统开发的指标，其一是系统准备度水平（SRL），其二是等效系统质量（ESM），通过评估这两个指标，可以为制定开发计划提供更多的决策信息支持。

Optimization of System Maturity and

Equivalent System Mass for Space Systems

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Engineering Management

Brian Sauser, IEEE Member, Romulo Magnaye, Weiping Tan, Jose E. Ramirez-Marquez, and Bruce Sauser

Abstract — In the assessment of system’s developmental

maturity, metrics are used for making effective and

efficient decisions. This paper introduces the combination

of two metrics used in systems development, i.e. Systems

Readiness Level (SRL) and Equivalent System Mass

(ESM), in order to make a more informed decision in the

developmental planning of Exploration Life Support

Systems. We then expand upon this approach by utilizing

an optimization model that seeks to maximize a system’s

readiness (i.e. SRL) given a budgetary allowance

expressed in terms of ESM. We conclude with an

articulation of this optimization model utilizing a generic

space system.

Index Terms— equivalent systems mass; integration readiness

level; system readiness level; integration readiness level

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