BOEING PROPRIETARY Rocketdyne Propulsion and Power CAD Data Translation - Past, Present and Future from consumers’ point of view The 7 th NASA-ESA Workshop on Product Data Exchange Atlanta, GA April 21, 2005 T. Charles Chen, Boeing – Canoga Park, CA (818) & Terry McGowan, Boeing – St. Louis, MO (314)

BOEING PROPRIETARY Rocketdyne Propulsion and Power Why does Boeing need CAD data translation? Boeing uses many non-native design tools and many different design methods. Data Translation is essential to leveraging enterprise resources and interoperability. Suppliers require accurate model formats that can be ingested easily into their systems (iges,STEP). MBD requires the exchange of Engineering Intent (EI) along with geometry to suppliers. No open format can accommodate that presently. Boeing needs to migrate up legacy program data. Regulatory requirement for long term retention of data in an open and neutral format for 50+ years. Adoption of a native toolset (DS V5) environment vs standardizing data formats (open, neutral, or universal) was implemented.

BOEING PROPRIETARY Rocketdyne Propulsion and Power MBD or Model Based Definition 3D model is the sole data authority No more 2D drawings The 3D model should contain everything needed from design to manufacturing, in particular, GD&T (Geometry Dimensions and Tolerance). Therefore we need GD&T in data translation STEP 203 E2 implementation will help

BOEING PROPRIETARY Rocketdyne Propulsion and Power MBD – Model Based Definition Boeing is transitioning rapidly to a model based environment. Data Delivery to supplier must be formatted robustly and efficiently and in a standard open format. Data must be “purposed” to the downstream activity to protect IP and KBE. Relational design chains must be preserved for interoperability. Attribute and Meta data must be passed in a Xlation and purposed. New materials will bring new requirements for data exchange.

BOEING PROPRIETARY Rocketdyne Propulsion and Power The Design CyclePROCESS DATAFORMAT REQ’sREQ’sREQ’sREQ’s TOOLSTOOLSTOOLSTOOLS Process drives out requirements Requirements are accommodated by data structure Data format enables the tool Tools accomplish the process INNOVATION!

BOEING PROPRIETARY Rocketdyne Propulsion and Power IGES & STEP history IGES v.1 IGES v5.3 STEP AP203 STEP AP203 E Multiple definitions for the same entity. Many IGES flavoring tools Hot not heard any STEP flavoring tools CAD system tolerance issues Need construction history, GD&T Many commercial direct translators A very successful application of IGES/STEP is long term data retention. Full interoperability?

BOEING PROPRIETARY Rocketdyne Propulsion and Power Feature-based translation Users expect translated model to be modifiable at the receiving site Feature-based translation or construction history or STEP AP203 E2 Feature-reconstruction bypasses CAD system tolerance issues, however, it brings in another set of problems – There are many incompatible features between CAD systems There are many construction methods for the same feature on the same CAD system (e.g.hole) Different CAD system employs different algorithms to computer intersection curves, therefore, we need translation validation.

BOEING PROPRIETARY Rocketdyne Propulsion and Power CAD Data Translation Validation Users have been asking for it since Day 1. What to validate? Do you care about these changes? geometry or shape topology – one sphere becomes two semi-spheres entity count math – exact representation of a circle by a NURBS spline mass property color changes layer changes Challenges Need to recognize that this is a new field How to communicate changes to a general user in a “general” language? Need a tool developed for this purpose

BOEING PROPRIETARY Rocketdyne Propulsion and Power Factors influence the quality of data translation Design standards Design methodology Design quality control Release process with a model quality check

BOEING PROPRIETARY Rocketdyne Propulsion and Power Design processes influence data translation needs paper drawing – no need for data translation 2D CAD drawing – dxf or IGES 3D CAD design – IGES or STEP 3D CAD solid design - STEP PLM – Product Lifecycle Management Data management is the center of the universe Designers must go to PDM to get appropriate CAD models CAD is one of many tools within PLM CAD data translation must go with PDM (CAD model + data maturity level + BOM + relational design…+etc)

BOEING PROPRIETARY Rocketdyne Propulsion and Power CAD Data Translation Challenges CAD systems were design for CAD, not data translation Data translation is a step-child of a CAD system Do CAD vendors care about data translation? No, this is a step-child. Yes, make sure it does not work well to export my data. STEP AP203 E2 implementation – How to get all major CAD vendors involved?

BOEING PROPRIETARY Rocketdyne Propulsion and Power What we do not want to translate Company intellectual property embedded in CAD models KBE (Knowledge Based Engineering) data Specific math formulas to create curves and surfaces Third party application software data - engineering notes in-house developed macros This is not a problem with current IGES, STEP or other direct translators. However, we are concerned with data exchange with suppliers in native CAD files such as CATIA V5 via a PDM system.

BOEING PROPRIETARY Rocketdyne Propulsion and Power Thank You !

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BOEING PROPRIETARY Rocketdyne Propulsion and Power How does Boeing perform data translation? Point solution Xlators tailored for specific native formats are utilized at Boeing Healthy use of iges and STEP for exchange of data. Validation shares equal priority with Xlation Boeing has adopted a common native toolset from Dassault Systems’ as a go forward strategy. Process>Requirements>DataStructure>Tool,----} Paradigm Single source master definition, vaulted data, distributed and repurposed for the target downstream activity. Highly reusable data sets.

BOEING PROPRIETARY Rocketdyne Propulsion and Power A brief history IGES V1.0 was released in 1981, the current version V5.3 was released in 1996 Geometry-based standard Non-unique definition for many entities Many IGES flavoring tools for repair STEP v1.0 was released in 1994 Product-based Have not heard about “step flavoring” tools An issue in both IGES and STEP: different CAD systems have different tolerance, therefore a trim surface may become untrimmed after translation. A very popular application of IGES/STEP is not data translation, it is long term data retention.

BOEING PROPRIETARY Rocketdyne Propulsion and Power Introduction Past – STEP expectations not met, what has accomplished, weak areas, work arounds, etc. Present – New standards evolving, current capabilities, limitations, work arounds, etc. Future – Full relational design expectations, dreams,