【正文】 Changan Ford Mazda Co. 49 Special Characteristics Summary Table Customer (External Effect) 特殊特性匯總表 客戶（外部影響） Design FMEA Classification 分類 To Indicate 說明 Criteria 標(biāo)準(zhǔn) Actions Required 要求措施 YS Potential Significant Characteristic 潛在 重要 特性 Both criterion 1 and 2 must be met: 標(biāo)準(zhǔn) 1和 2需同時(shí)滿足 : 1. Characteristic has a causal relationship to Potential Failure Modes having Severity of Effects rated 58, or where agreed by the crossfunctional team, having Severity of Effects rated 5 與嚴(yán)重度為 58的潛在失效模式有直接因果關(guān)系的特性；或經(jīng)團(tuán)隊(duì)一致同意，與嚴(yán)重度5的潛在失效模式有直接因果關(guān)系的特性 2. Characteristic may be influenced by the manufacturing process and may require special control to maintain the required process capability 該特性可能被生產(chǎn)過程影響并且可能需要特殊控制以保持其過程能力 The DR Engineer and the Manufacturing Engineer, and/or Supplier work collaboratively to develop optimal countermeasures 設(shè)計(jì)工程師以及制造工程師，和 /或供應(yīng)商協(xié)同合作制訂出最優(yōu)的應(yīng)對(duì)措施 Process FMEA Classification 分類 To Indicate 說明 Criteria 標(biāo)準(zhǔn) Actions Required 要求措施 SC Significant Characteristic 重要 特性 Either criterion 1 or 2 are met: 滿足標(biāo)準(zhǔn) 1或 2均可： 1. Characteristics that aligns to Potential Failure Modes with Severity of Effects ratings of 5 to 8, with final PFMEA Occurrence Ratings greater than 3 與嚴(yán)重度為 58的潛在失效模式相關(guān)的特性，且 PFMEA發(fā)生率評(píng)分 3 2. Where the crossfunctional team approves, characteristics that align to Potential Failure Modes with Severity of Effects ratings 5, with final PFMEA Occurrence Ratings greater than 3 經(jīng)團(tuán)隊(duì)一致同意，與嚴(yán)重度 5的潛在失效模式相關(guān)的特性，且 PFMEA發(fā)生率評(píng)分 3 Special Controls and Inclusion in the Control Plan 包含在控制計(jì)劃中并加以特殊控制 STA Team, Changan Ford Mazda Co. Copyright Ford Motor Company 2023 50 Key Process Change in January 2023 – Criteria for YS 2023年 1月關(guān)鍵更改 YS標(biāo)準(zhǔn) ? Occurrence removed as a criteria to determine a potential significant characteristic (YS) 發(fā)生度不再作為潛在重要特性 YS的評(píng)價(jià)標(biāo)準(zhǔn)。 ? Addition of consideration of the influence of the manufacturing process before the designation of a YS 在確定為 YS之前，需要額外考慮其是否會(huì)受到制造過程影響； ? Ability to designate a characteristic as a YS with severity less than 5 if agreed by the cross functional team ? 如果各相關(guān)部門一致同意，與嚴(yán)重度小于 5失效模式相關(guān)的特性也可被歸為 YS。 YC S=9 S=10 Design FMEA S=58 O=410 YS YC S=9 S=10 Design FMEA S=58 or where agreed by team, S5 AND Characteristic influenced by mfg process AND may require special control YS 嚴(yán)重度為 58，或嚴(yán)重度小于 5（相關(guān)部門一致同意），且受到生產(chǎn)過程影響并可能需要特殊控制的特性可歸類為 YS STA Team, Changan Ford Mazda Co. 路徑 /步驟 2特殊特性例 問題 1：例中這個(gè)“ CTQ”指的是產(chǎn)品哪個(gè)特性？ 問題 2：完成 RAR后，若 SC特性所展現(xiàn) Ppk，也就相當(dāng)O1，此時(shí)不符合確定 SC的要求，可以取消 SC特性？ 過程步驟 功能 要求 潛在失效模式 失效潛在 影響 嚴(yán)重度 s 分類 失效潛在 原因 現(xiàn)行過程 控制預(yù)防 發(fā)生度 O 凸焊螺母（ M8）焊接強(qiáng)度滿足ESBM5A_1N265_AA標(biāo)準(zhǔn)要求 虛焊、弱焊 顧客裝配脫落，引起抱怨，增加售后返修成本。 6 CTQ 參數(shù)設(shè)置不合理 班前參數(shù)檢查 試片試驗(yàn) 3 冷卻水流量不足 安裝報(bào)警器：使凸焊時(shí)水流量不足焊機(jī)自動(dòng)停止 分流 對(duì)分流處進(jìn)行絕緣或讓位處理 電極不平整或未對(duì)中 班前設(shè)備檢查、定期修磨電極 STA Team, Changan Ford Mazda Co. 路徑 /步驟 2重要特性（ SC）傳遞例 過程 /功能要求 潛在的失效模式 潛在失效后果 S 級(jí)別 潛在失效原因 /機(jī)理 O 組件 (……177。 .m) 少裝螺釘 …泄露 … 顧客拒收 7 S C 線速太快，遺漏裝螺釘 4 部分或全部的螺釘達(dá)不到力矩 濾芯邊緣PU膠未壓緊，泄漏 … 7 S C …… 4 …… 2 S C 螺釘螺紋直徑偏小 …… 4 下殼體沉孔徑超差偏大 3 DFMEA PFMEA STA Team, Changan Ford Mazda Co. 53 Special Characteristics Summary Table Customer (External Effect) 特殊特性匯總表 客戶（外部影響） Copyright Ford Motor Company 2023 Key Points 要點(diǎn) : ? Influenced by manufacturing means that the process can potentially affect the value of the characteristic to an extent that may create the identified failure mode. An example of a characteristic that would not be affected by manufacturing is material specification as plastic vs metallic for a cause of corrosion, if plastic is selected in the design, then no amount of variation in the process can cause the plastic to corrode. 受制造影響的意思是指過程潛在可能一定范圍內(nèi)影響特性值而產(chǎn)生失效模 式。例如造成腐蝕的原因，塑料在制造過程中不受影響，而金屬會(huì)，若設(shè) 計(jì)選擇塑料，那過程中的變差怎么也不會(huì)導(dǎo)致塑料腐蝕。 ? The determination of whether or not YSs bee SCs is based on estimation of rate of Occurrence using documented process capability data . YS是否會(huì)轉(zhuǎn)換成 SC是基于現(xiàn)有的過程能力數(shù)據(jù)對(duì)發(fā)生率的估計(jì)。 ? SCs may be identified in the PFMEA, without alignment to a YS in the DFMEA, as long as they satisfy the PFMEA SC Criteria . PFMEA中確定的 SCs，不一定會(huì)對(duì)應(yīng)于 DFMEA中的某個(gè) YS，只要其能滿 足 PFMEA中 SC的標(biāo)準(zhǔn)即可。 STA Team, Changan Ford Mazda Co. 路徑 /步驟 2特殊特性表 FMEA Type Classification To Indicate Criteria Actions Required Design YC Severity = 9, 10 Highlight for PFMEA Team Focus Design YS Severity = 5 8 And Occurrence = 4 10 Design Blank Not a potential Critical Characteristic or Significant Characteristic Severity 5 Not Required Process ??CC A Critical Characteristic Special Control Required* Customer/Product Effect Process SC A Significant Characteristic Process HI High Impact Severity = 5 8 and Occurrence = 4 10 Emphasis Process OS Operator Safety Safety SignOff Process Blank Not a Special Characteristic Other Does Not Apply * Included in the Control Plan Manufacturing/ Assembly Effect A potential Critical Characteristic (Initiate PFMEA) A potential Significant Characteristic (Initiate PFMEA) Severity = 9, 10 Severity = 9, 10 Highlight for PFMEA Team Focus Special Control Required* Severity = 5 8 and Occurrence = 4 10 STA Team, Changan Ford Mazda Co. 如何開發(fā) PFMEA？ 路徑 /步驟 3 Process Function Requirements POTENTIAL FAILURE MODE AND EFFECTS ANALYSIS Potential Failure Mode O c c u r Current Controls Remended Action(s) Responsibility Ta