报价单做得光鲜，一进仓库全是灰。车间仓库比报价单诚实，现场得去看。
报价光鲜仓库全是灰，现场没看
TPE 供应商审核是“现场活”：车间、仓库、设备。结论先给：车间仓库比报价单诚实——现场，是供应商的照妖镜。
TPE供应商审核最大的坑：报价单吹得天花乱坠，进车间一看设备全是老机器——现场，是审核的准星。
审核是采购基本功：会审供应商，风险提前排。不会审，踩坑——审核，是采购的必修课。
现场藏不住，为什么先跑车间
报价单能编：数据可以美化。报价，是表象。
车间藏不住：设备、管理看得见。车间，是底细。
仓库藏不住：库存、批次看得见。仓库，是账本。
车间、仓库、设备，看什么
车间：5S、工艺、质检。车间乱，品质差——车间，是头一站。
仓库：库存、批次、防潮。仓库乱，批次混——仓库，是第二站。
设备：机台、模具、维护。设备旧，良率低——设备，是第三站。
审核要点，一张表对照清楚
| 地点 | 看什么 | 判断 |
|---|
| 车间 | 5S工艺 | 必看 |
| 仓库 | 批次防潮 | 必看 |
| 设备 | 维护 | 必看 |
| 质检 | 记录 | 必看 |
表格读法：地点逐站看，一样不落，车间和仓库都要走一遍。
现场看，底细清。
看过厂才放心，评估核这四项
| 项目 | 要求 | 判断 |
|---|
| 车间 | 整洁 | 达标 |
| 仓库 | 有序 | 达标 |
| 设备 | 维护 | 达标 |
| 质检 | 记录 | 达标 |
表格读法：审核一项项核，风险看得见，库存和混批情况当场看。
现场，是审核的准星。
只看报价不跑现场，实力靠嘴说
坑一：只看报价。报价低就打款，没去过现场就合作——现场必看。
坑二：仓库不查。批次混——仓库必查。
坑三：质检不看。品质差——质检必看。
产线、检测、批次——审核前问清
三问：什么车间、什么仓库、什么质检。一验：现场审核实测——三问一验，供应商底细清楚。
现场验证要先行：先把车间设备、仓库分区、留样制度看完，再谈合作——现场，是供应商的照妖镜。
留样要成习惯：每批留样，物性按批次复测。批次换料先对比再放量——批次稳，客诉少。
小作坊、挂靠、乱仓：对照一张表
| 现象 | 原因 | 对策 |
|---|
| 踩坑 | 只看报价 | 看现场 |
| 批次混 | 仓库乱 | 查仓库 |
| 品质差 | 质检松 | 看质检 |
| 良率低 | 设备旧 | 看设备 |
| 客诉 | 审核松 | 走流程 |
报价单能美化，车间和仓库装不出来。看料堆怎么放、回料怎么标、色粉怎么存，比看十页资质有用。
审核带三样去：主打牌号、验收标准、留样清单。现场抽一包料对编号，剥一袋看断面，水分当场现形。
盯住两件事：混料率和留样量。水口副牌占比写进审核记录，每批留样是否成箱可查，一眼见底。
只在会议室看 PPT 的审核，等于没审。真正的批次漂移、发粘、析出发白，都藏在仓库角落。
品质差不是车间做不出来，是质检在放行时松了手。抽检比例、不良台账翻一翻，比听介绍靠谱。
审核带三样：主打牌号、验收标准、留样清单。现场抽一包对编号、剥一袋看断面，水分和混料率当场现形，只在会议室看PPT等于没审。
盯混料率和留样量，水口副牌占比写进记录
。每批留样成箱可查，质检抽检比例和不良台账翻一翻，品质差不是做不出来是放行时松了手。
报价单能美化车间和仓库装不出来
。看料堆怎么放、回料怎么标、色粉怎么存比看十页资质有用，真正的批次漂移发粘析出发白都藏在仓库角落。
品质差不是车间做不出来是质检在放行时松了手
。抽检比例不良台账翻一翻比听介绍靠谱，只在会议室看PPT的审核等于没审真正的批次漂移发粘析出发白都藏在仓库角落。
报价单能美化车间和仓库装不出来
。看料堆怎么放回料怎么标色粉怎么存比看十页资质有用，
审核带三样去主打牌号验收标准留样清单现场抽一包料对编号剥一袋看断面水分当场现形。
科隆客户案例：收缩率不稳波动大，换体系续三单
重庆一家汽车零部件厂，TPE 件收缩率不稳，尺寸波动大。科隆配合换体系换牌号（SEBS 基换 TPV 基），尺寸稳定，客户连续三个批次续单。体系换了，批次问题从源头断——尺寸问题，先看体系稳定性。
小结
TPE供应商审核的做法，现场先看，仓库再查，车间和仓库比纸面报价诚实，现场是准星。
The quotation looks impressive, but once you enter the warehouse, it's all dust. The workshop and warehouse are more honest than the quotation; you have to see the site yourself.
The quoted price looks good, but the warehouse is full of dust, didn’t inspect on site
TPE supplier audits are an 'on-site activity': workshops, warehouses, equipment. Here's the conclusion first: workshops and warehouses are more honest than the quotation — being on-site is a truth-revealing mirror for suppliers.
The biggest pitfall in TPE supplier audits: the quotation is hyped up to the sky, but when you enter the workshop, all the equipment is old machines — on-site, it is the aiming point for the audit.
Auditing is a basic skill in procurement: review suppliers and identify risks early. If you don't know how to audit, you'll fall into pitfalls — auditing is a mandatory course in procurement.
The scene can't be hidden, so why run to the workshop first?
The quotation can be prepared: the data can be beautified. A quotation is just the appearance.
The workshop can't hide anything: equipment and management are visible. The workshop reveals the details.
The warehouse can't hide: inventory and batches are visible. The warehouse is a ledger.
Workshop, warehouse, equipment, what to look at
Workshop: 5S, process, quality inspection. If the workshop is messy and the quality is poor — the workshop is the very first station.
Warehouse: inventory, batches, moisture-proofing. If the warehouse is messy and batches are mixed up—the warehouse is the second stop.
Equipment: machines, molds, maintenance. Equipment is old, yield is low — equipment is the third station.
Key points of review, clearly compared in one table
| Location | What are you looking at? | Judgment |
|---|
| Workshop | 5S Process | Must watch |
| Warehouse | Batch Moisture-proof | Must watch |
| Equipment | Maintenance | Must watch |
| Quality Inspection | Record | Must watch |
Table reading method: Check each station at the location one by one, without missing any; both the workshop and the warehouse must be visited.
Seeing it on site, the details are clear.
You can only be reassured after visiting the factory and evaluating these four aspects carefully.
| Project | Requirement | Judgment |
|---|
| Workshop | Neat | Meet the standard |
| Warehouse | Ordered | Meet the standard |
| Equipment | Maintenance | Meet the standard |
| Quality Inspection | Record | Meet the standard |
Table reading: Review item by item, see the risks clearly, and check the inventory and mixed batch situation on the spot.
The site is the aiming point for the audit.
Only look at the quotes without visiting the site, relying on words to show capability
Pitfall 1: Only look at the quotation. If the price is low, make the payment without visiting the site—always inspect the site in person.
Pitfall 2: The warehouse doesn't check. Mixed batches — the warehouse must check.
Pitfall Three: Quality inspection doesn’t check. Poor quality — quality inspection must check.
Production line, inspection, batch — ask clearly before the audit
Three questions: which workshop, which warehouse, which quality inspection. One verification: on-site audit and actual measurement — three questions and one verification, supplier details clearly understood.
On-site verification comes first: first inspect the workshop equipment, warehouse partitioning, and sampling system, then discuss cooperation—on-site is the supplier's truth-revealing mirror.
Making sample retention a habit: retain samples for each batch, and re-test the physical properties by batch. Before switching materials between batches, compare them first before scaling up—the batch stability is maintained, and customer complaints are reduced.
Small workshops, affiliation, chaotic storage: compared in a table
| Phenomenon | Reason | Countermeasure |
|---|
| fall into a trap | View only quotes | See the scene |
| Batch mixing | The warehouse is messy | Check the warehouse |
| Poor quality | Quality inspection pine | Check quality inspection |
| Low yield | Old equipment | Check the equipment |
| Customer complaint | Relaxed review | Follow procedures |
Quotations can be beautified, but the workshop and warehouse can't be faked. It's more useful to see how material stacks are arranged, how returned materials are labeled, and how color powders are stored than to look at ten pages of credentials.
Bring three items for review: the main brand number, the acceptance standards, and the sample retention list. On-site, take a random pack of material to check the number, open a bag to inspect the cross-section, and the moisture content will be revealed on the spot.
Focus on two things: the mixing ratio and the sample amount. Record the proportion of secondary brand in the audit log, and check whether each batch's sample is kept in full boxes at a glance.
Reviewing the PPT only in the conference room is equivalent to not reviewing it at all. The real batch drift, stickiness, and whitening from precipitation are all hidden in the corners of the warehouse.
Poor quality is not because the workshop can't produce it, it's because the quality inspection relaxed its standards during release. Reviewing the sampling ratio and the defective product records is more reliable than listening to explanations.
The audit involves three items: the main brand number, acceptance standards, and sample retention list. On-site, take a pack to check the number, open a bag to see the cross-section; moisture content and mixing ratio are revealed on the spot. Just looking at a PPT in the meeting room is equivalent to not auditing at all.
Keep an eye on the mixed material ratio and the sample retention amount, and record the proportion of secondary water gate labels.
Each batch of samples kept in boxes can be checked. Flip through the quality inspection sampling ratio and the defective account. Poor quality is not because it can't be made, but because too much leniency was shown at the time of release.
The quotation can beautify the workshop and warehouse but cannot be implemented
Watching how the material piles are arranged, how the return materials are labeled, and how the pigments are stored is more useful than reading ten pages of qualifications; the real issues with batch drift, stickiness, precipitation, and whitening are all hidden in the corners of the warehouse.
Poor quality is not because the workshop can't produce it, but because quality inspection loosened up during approval.
Flipping through the ledger of defective items found in random inspections is more reliable than listening to introductions; audits that only look at PPTs in the meeting room are equivalent to not actually inspecting. True batch drift, stickiness, precipitation, and whitening are all hidden in the corners of the warehouse.
The quotation can beautify the workshop and warehouse but cannot be implemented
Watching how the material pile is placed, how the material is labeled, and how the powder is stored is more useful than looking at ten pages of qualifications.
During the inspection, take three samples to the main brand number acceptance standard sample list, randomly draw one bag of material on site, open one bag according to the serial number, and check the cross-section and moisture content on the spot.
Cologne customer case: shrinkage rate unstable and fluctuating, switched system and continued three orders
A Chongqing auto parts factory has unstable shrinkage rates for TPE parts and large size fluctuations. Cologne cooperated to change the system and grade (from SEBS-based to TPV-based), resulting in stable sizes, and the customer placed repeat orders for three consecutive batches. With the system changed, batch problems are cut off at the source—the size issue should first look at the system stability.
Summary
The practice of TPE supplier audits is to first inspect on-site, then check the warehouse. The workshop and warehouse are more honest than the paper quotes; the on-site inspection is accurate.
