BS/EN 16603-10-2018 pdf download.Space engineering-System engineering general requirements.
4.2 The system engineering process
The system engineering activities of a project are conducted by an entity or resources within the project team of a supplier. This entity or the resources that perform this function is called in this document system engineering tunction.
The system engineering process is in turn applied by each system engineering function of each supplier of the elements of the product decomposition.
The system engineering process consists of activities to be performed by the system engineering function within each project phase according to the designated lifecycle model. The objective is to obtain a product which satisfies the customer technical requirements within pre-established objectives of cost. time and quality. The requirements for these activities are described in clause 5.
The system engineering process is intrinsically iterative across the whole life of a project, in particular in the initial phases (i.e. 0. A. and 8) of the development of a complex system (e.g. a spacecraft), procured through a multi-layered set of suppliers.
During these phases, the system engineering function derives design oriented technical solutions starting from the designindependent customer requirements contained in a technical requirements specification (TS). This is achieved through an iterative top-down process by trading off several design solutions at an increasing level of detail.
NOTE For definition and requirements for a technical
requirements specification see ECSS-E-ST-1O-06.
Through this process the system engineering function performs a multidisciplinary functional decomposition to obtain logical lower level
products (both hardware and software). At the same time the system engineering function decides on balanced allocations, throughout the system. of resources allocated by the customer and respects agreed margin philosophies as a function of the relevant technology readiness levels.
The functional decomposition defines, for each level of the system, the technical requirements for the procurement of subassemblies or lower level products as well as the requirements for the verification of the final characteristics of each product.
The system engineering process uses the results of these lower level verification activities to build a bottom-up multi-layered evidence that the customer
requirements have been met.
The system engineering process is applied with various degrees of depth depending on the level of maturity of the product (e.g. new development or off- the-shelf).
The system engineering process can be applied with different level of tailoring as agreed between customer and supplier in their business agreement.
The system engineering function has interfaces with those other functions in charge of management, product assurance, engineering disciplines, production, and operations and logistics.
NOTE The project phases are defined in ECSS-M-ST
10.
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4.3 Overview of system engineering tasks per project phase
4.3.1 Overview
The allocation of specific system engineering requirements per phase depends strongly on the type of business agreement established between customer and supplier and the nature and level of complexity of the system subject of the agreement. The breakdown and the details of the tasks are defined in the business agreement specific documents.
NOTE Some projects define them in a Statement of
work (SoW).
The actors in the customer-supplier relationship change between phases and across levels. In the following clauses each system engineering function is meant to be the suppliers system engineering function during that phase.
4.3.2 General
a. The system engineering function plans its activities in conformance with
the project phases as defined in the Project Management Plan in accordance with ECSS-M-ST-1O and document it in the SEP as per Annex
0.
NOTE The phases or combination thereof to be implemented for a project are specified in the
business agreement.
b. The system engineering function monitors the execution of all system engineering activities including lower levels.
c. The system engineering function identifies the critical items in cooperation with the Product Assurance (PA) according to ECSS-Q-ST-1O (PA being tasked to manage the critical items throughout the project life).
d. The system engineering function ensures that for critical items the technical requirements specification, the design definition file and the design justification file are available at latest by end of Phase B.
NOTE Information regarding the expected delivery of system engineering documents for each project
review is provided in 7.
The documents to be approved by the customer as well as the time of their approval are listed in the business agreement.
e. The system engineering function activities need to be aligned with Product Assurance (PA) activities according to ECSS-Q-ST-1O throughout the project life. This includes definition and execution of tasks in which PA activities are involved (detailed In the Product Assurance Plan).BS/EN 16603-10-2018 pdf download.