Key attributes of spare part candidates for the dynamic decision-making practice
| Spare parts attributes | Description | Data source | |
|---|---|---|---|
| Part number | The part number is used to identify the part and request information from different IT systems consisting of a large portfolio of spare parts | DWG-code and SAP-code provided by the case company | |
| Preview | An image of the spare part that assists in evaluating geometric complexity | 2D drawing or 3D model provided by the case company | |
| Year designed | This metric provides an insight on the age of the spare part. Older parts have more tendency of being over-designed for manufacturing | 2D drawing provided by the case company | |
| Format | The format is used to distinguish parts that had 2D engineering drawings and/or 3D CAD models | Spare part data provided by the case company | |
| Purpose | The purpose aids in evaluating the operating conditions of the part | Case company experts | |
| Material | The material indicates the type of material according to the relevant standards | Material standards in 2D drawing and case company experts | |
| Dimensions (L × W × H) [mm] | The dimensions indicate the length, width, and height of the part in millimeters. This describes the minimum bounding box of the part in the build volume of an AM machine | 2D drawing and/or 3D model provided by the case company | |
| Tightest tolerance [mm] | The tightest tolerance assists in the selection of AM technology which may satisfy the tolerance or restrict it to a specific interface of the part that can be post-processed or machined to achieve the correct tolerance within the prescribed range | 2D drawing provided by the case company and general dimensions and tolerances standard | |
| Overall tolerance [mm] | In contrast to the tightest tolerance, this is the highest numerical range of measurements that a dimension and/or angle has been assigned. If an AM technology is unable to achieve this tolerance, most likely all the features of the parts would need to be post-processed and machined, requiring part-specific set-ups | 2D drawing provided by the case company and general dimensions and tolerances standard | |
| Surface roughness (smoothest) [µm] | These features aid in selecting the AM technology and the post-processing steps | 2D drawing provided by the case company | |
| Parallelism [mm] | 2D drawing provided by the case company and general tolerances for features standard | ||
| Perpendicularity [mm] | |||
| Conventional manufacturing methods | Primary | Primary process describes the basic shape or form | 2D drawing, 3D model, researchers, and case company experts |
| Machining | Machining processes describe the extent of modification that is required to achieve the desired shapes or properties of parts. Multiple processes may require additional set-ups and can be labor-intensive | 2D drawing, 3D model, researchers, and case company experts | |
| Equipment/machinery [–] | The equipment or machinery aids in evaluating the environmental conditions of the part | 2D drawing and case company experts | |
| Downtime [yes/no] | The downtime describes whether a premature failure or service cycle of a part causes an interruption in the equipment operations | Case company experts | |
| Type of loading [static/variable/shock] | The type of loading aids in evaluating the mechanical loads and the potential mode of failure that the part may be subjected to during its service life. This helps in material selection for AM | Case company experts | |
| Lead-time [weeks] | The time that is required to manufacture and deliver the spare part | Case company experts | |
| Cost [EUR] | This is cost of conventionally manufacturing the spare part | Case company experts | |
| Eligibility [AM or CM] | Eligibility describes the assessment of spare part candidates whether to switch operations to AM or continue with conventional manufacturing | Researchers and case company experts | |
| Reasoning | Justifications of assessed operations | Researchers and case company experts | |
| Spare parts attributes | Description | Data source | |
|---|---|---|---|
| Part number | The part number is used to identify the part and request information from different IT systems consisting of a large portfolio of spare parts | DWG-code and SAP-code provided by the case company | |
| Preview | An image of the spare part that assists in evaluating geometric complexity | 2D drawing or 3D model provided by the case company | |
| Year designed | This metric provides an insight on the age of the spare part. Older parts have more tendency of being over-designed for manufacturing | 2D drawing provided by the case company | |
| Format | The format is used to distinguish parts that had 2D engineering drawings and/or 3D CAD models | Spare part data provided by the case company | |
| Purpose | The purpose aids in evaluating the operating conditions of the part | Case company experts | |
| Material | The material indicates the type of material according to the relevant standards | Material standards in 2D drawing and case company experts | |
| Dimensions (L × W × H) [mm] | The dimensions indicate the length, width, and height of the part in millimeters. This describes the minimum bounding box of the part in the build volume of an AM machine | 2D drawing and/or 3D model provided by the case company | |
| Tightest tolerance [mm] | The tightest tolerance assists in the selection of AM technology which may satisfy the tolerance or restrict it to a specific interface of the part that can be post-processed or machined to achieve the correct tolerance within the prescribed range | 2D drawing provided by the case company and general dimensions and tolerances standard | |
| Overall tolerance [mm] | In contrast to the tightest tolerance, this is the highest numerical range of measurements that a dimension and/or angle has been assigned. If an AM technology is unable to achieve this tolerance, most likely all the features of the parts would need to be post-processed and machined, requiring part-specific set-ups | 2D drawing provided by the case company and general dimensions and tolerances standard | |
| Surface roughness (smoothest) [µm] | These features aid in selecting the AM technology and the post-processing steps | 2D drawing provided by the case company | |
| Parallelism [mm] | 2D drawing provided by the case company and general tolerances for features standard | ||
| Perpendicularity [mm] | |||
| Conventional manufacturing methods | Primary | Primary process describes the basic shape or form | 2D drawing, 3D model, researchers, and case company experts |
| Machining | Machining processes describe the extent of modification that is required to achieve the desired shapes or properties of parts. Multiple processes may require additional set-ups and can be labor-intensive | 2D drawing, 3D model, researchers, and case company experts | |
| Equipment/machinery [–] | The equipment or machinery aids in evaluating the environmental conditions of the part | 2D drawing and case company experts | |
| Downtime [yes/no] | The downtime describes whether a premature failure or service cycle of a part causes an interruption in the equipment operations | Case company experts | |
| Type of loading [static/variable/shock] | The type of loading aids in evaluating the mechanical loads and the potential mode of failure that the part may be subjected to during its service life. This helps in material selection for AM | Case company experts | |
| Lead-time [weeks] | The time that is required to manufacture and deliver the spare part | Case company experts | |
| Cost [EUR] | This is cost of conventionally manufacturing the spare part | Case company experts | |
| Eligibility [AM or CM] | Eligibility describes the assessment of spare part candidates whether to switch operations to AM or continue with conventional manufacturing | Researchers and case company experts | |
| Reasoning | Justifications of assessed operations | Researchers and case company experts | |
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