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The ECN also requires formal management approval and defines when the change should be introduced, including immediate scrapping, next production run timing, or other milestones. 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It documents justification for changes after the initial design is complete and ensures approvals are obtained.","Answer",{"name":64,"@type":59,"acceptedAnswer":65},"What information must an ECN include at minimum?",{"text":66,"@type":62},"An ECN must include identification of what needs to be changed (with part/component details and references), the reasons for change, a description with drawings showing before and after, lists of affected documents, approval requirements, and instructions for when to introduce the change.",{"name":68,"@type":59,"acceptedAnswer":69},"How does EML2322L specify when and how ECNs should be submitted?",{"text":70,"@type":62},"For EML2322L, teams must fill out an ECN for changes made once the third design report is formally submitted. 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ECN documentation contains the justification for changes made to a component or system once the initial design is complete. It also forces changes to be approved by the relevant authorities (often the project manager) .  \nAn ECN must contain at least the following information (Ullman 2009) :  \n• Identification of what needs to be changed. This should include the part number and name of the component and reference to drawings showing the component in detail or assembly.  \n• Reason(s) for the change.  \n• Description of the change. This includes a drawing of the component before and after the change. The drawings must clearly show the detail(s) affected by the change.  \n• List of documents (and in industry, the departments) affected by the change. The most important part of making a change is ensuring all pertinent groups are notified and all documents updated.  \n• Approval of the change. As with the detail and assembly drawings, the changes must be approved by management.  \n• Instruction about when to introduce the change—immediately (scrapping current inventory), during the next production run, or at some other milestone.  \nApplication for EML2322L  \nOn any engineering project, the design work should conclude before manufacturing commences. Sometimes we rush through the design phase because we are excited to begin fabrication. Design changes made in the manufacturing phase are much more costly than changes made during the initial design phase. To encourage groups to do the best job possible during the initial design phase, teams must fill out an ECN for any change(s) made once the third design report is formally submitted. For EML2322L an ECN will contain the following information:  \n• Identification of what needs to be changed. This should include the component’s name, part number and reference to the component’s detail drawing(s) .  \n• Reason(s) for change(s) .  \n• Description of change(s) . This includes a drawing of the component before (i.e. REV. A) and after the change (REV. B) . REV. is short for revision.  \n• List of components and documents affected by the change (i.e. assembly drawing, B.O.M., other detail drawings, P.O., etc.) . The most important part of making a change is ensuring all pertinent people are notified of changes that affect their component(s) .  \n• Approval of the change. As with the detail and assembly drawings, the changes must be approved by “management”. For this course, management will comprise all group members plus the signature of the course instructor or TA.  \n• Instruction about introducing the change: modifying or eliminating an existing part, making anew part, etcetera.  \n• ECNs must be completed and submitted within one week of initiation or they will be late.  \nEngineering Change Notice EXAMPLE  \n\n| ENGINEERING CHANGE |  |  |  |\n| --- | --- | --- | --- |\n| ORIGINAL PART/DRAWING NAME/NO.\u003Cbr>EML2322L-020 | REVISION. NO.\u003Cbr>A | PART DESCRIPTION\u003Cbr>wheel hub for Denso 150 rpm gearmotor | ECN NO. 1 |\n| CHANGED PART/DRAWING NAME/NO.\u003Cbr>EML2322L-020 | REVISION. NO.\u003Cbr>B | wheel hub for Entstort 44 rpm gearmotor | GROUP NO.\u003Cbr>4B |\n| REASON FOR CHANGE\u003Cbr>After testing the robot, our group realized the Denso 150 rpm right angle motors coupled to 13.5” diameter wheels produce a robot that is too fast to control, given our ball manipulator design. Consequently, we decided to change the hub design so it is compatible with the 44 rpm Entstort motor shaft. |  |  |  |\n| DESCRIPTION OF CHANGE\u003Cbr>Since the 44 rpm Entstort motor shaft possesses splines, we are modifying the hub design shown in Revision A to engage these splines; this is accomplished by drilling a Ø0.394”(10mm) stepped bore into the motor-side of the hub, as shown in Revision B. The threaded portion of the motor shaft passes through the center hole w","cbCaijG6c8oO3bEp","https://ap.wps.com/l/cbCaijG6c8oO3bEp","pdf",208757,"English","# Engineering Change Notice (ECN) Definition\n## Required Information in an ECN\n# Application for EML2322L\n## Timing and Submission Rules\n# Engineering Change Notice Example","[{\"question\":\"What is the purpose of an Engineering Change Notice (ECN)?\",\"answer\":\"An ECN authorizes and records design changes throughout the prototyping and life-cycle phases of a product. It documents justification for changes after the initial design is complete and ensures approvals are obtained.\"},{\"question\":\"What information must an ECN include at minimum?\",\"answer\":\"An ECN must include identification of what needs to be changed (with part/component details and references), the reasons for change, a description with drawings showing before and after, lists of affected documents, approval requirements, and instructions for when to introduce the change.\"},{\"question\":\"How does EML2322L specify when and how ECNs should be submitted?\",\"answer\":\"For EML2322L, teams must fill out an ECN for changes made once the third design report is formally submitted. ECNs must be completed and submitted within one week of initiation; otherwise they are considered late.\"}]","Engineering Change Notice - Definition - Application for EML2322L - Example | PDF",13]