Supplier Annual conference 2022

Criteria score KPI of TSPK-G (2022) Evaluation Detail Weight KPI of TSPK-G (2021) Evaluation score ≥ 99 Point DELIVERY 100 % ON TIME 30 Points PARTS ACCURACY 30 Points Evaluation score ≥ 99 Point AWARENESS 20 Points PACKAGING 10 Points CO-OPERATION (Safety) 10 Points Total 100 Points Rank Score Details 99 A 100 - 98 Prefered suppliers, priority to awards new business B 97 - 85 Prefered suppliers, continuity of business C 84 - 65 Continuity of business, need improvement D 64 Below No new business until further improvement

4. Importance information

Importance information EOP Program information 2021 2022 YEAR Product J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec J an Feb Mar Apr May J un J ul Aug Sep Oct Nov Dec P375 Frame INF. 6 Month EOP U375 Frame INF. P375R Frame INF. 8 Month EOP P375 Axle INF. 10 Month EOP 15 Month EOP TSPK’s Requirement EOP Program TSPK END OF MODEL OFFICIAL LETTER 1.Supplier send official letter cut of EOP part / Material to Trie#2 & Coil center OEM END OF MODEL 2.Confirm BOM of assembly part 3.Confirm size , spec weight/pcs. of material 4.Confirm stock all of part & Material 5.Confirm forecast with matching TSPK forecast 6.Sub-Supplier update forecast to Trie#2,3,Coil center, Trading every month 7.Supplier should be Fix & Control production plan FG as minimum lot by refer TSPK weekly confirm 101

Importance information EOP Program information P375 Frame Volume run down P375 Frame Weekly Forecast Backup data seized on date 30 August 2021 830 No. / Date 30-Aug-21 06-Sep-21 13-Sep-21 20-Sep-21 27-Sep-21 04-Oct-21 11-Oct-21 18-Oct-21 25-Oct-21 07-Feb-22 14-Feb-22 21-Feb-22 28-Feb-22 07-Mar-22 14-Mar-22 21-Mar-22 28-Mar-22 Total 3,335 2,835 1,980 2,149 3,063 1,951 1,303 2,818 2,378 1,672 1,255 92 78,907 897-1 3,226 - 3,008 3,186 3,134 3,338 2,988 2,323 2,693 2,873 2,622 1,362 2,272 2,097 1,666 1,287 64 74,909 3,437 3,266 2,500 2,694 2,868 2,644 1,372 2,426 2,283 1,749 819 64 74,529 897-2 978 1,918 1,892 1,687 3,273 3,303 3,368 2,573 2,942 3,994 3,540 1,697 3,268 2,700 1,782 801 64 86,439 2,856 2,715 2,376 2,322 2,869 2,672 1,168 2,456 2,284 1,858 781 73,740 897-3 978 867 3,029 1,370 3,584 2,611 2,331 1,759 2,068 3,118 2,266 1,044 2,471 1,962 1,831 873 685 70,808 2,001 2,023 1,618 2,095 3,099 2,202 1,086 2,504 1,990 1,770 917 689 69,268 897-4 978 867 1,934 1,944 3,069 2,001 1,410 1,935 2,118 3,103 2,212 1,039 2,569 1,958 1,786 562 669 69,379 2,001 1,410 1,689 4,166 3,101 2,329 1,054 2,575 2,120 1,898 425 338 69,563 897-5 978 867 1,934 1,400 3,000 2,001 1,410 1,689 1,665 3,051 2,211 989 2,443 1,986 1,767 440 239 68,748 2,001 1,410 1,689 1,665 2,881 2,500 1,036 2,597 2,198 1,816 376 240 70,457 898-1 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 2,881 2,494 1,040 2,599 2,185 1,867 451 272 70,664 2,001 1,410 1,689 1,665 3,090 2,285 1,040 2,599 2,185 1,867 501 272 70,380 898-2 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 3,223 2,459 1,729 2,652 2,249 1,824 371 403 70,396 2,001 1,410 1,689 1,665 3,202 2,442 1,980 2,505 2,310 1,851 325 403 69,878 898-3 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 3,249 2,384 2,023 2,595 2,315 1,696 311 449 70,054 2,001 1,410 1,689 1,665 3,249 2,384 1,938 2,680 2,307 1,704 311 581 69,900 898-4 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 3,804 2,462 2,174 2,742 2,295 1,724 883 581 69,529 2,001 1,410 1,689 1,665 3,794 2,466 2,176 3,433 3,024 2,109 934 446 69,224 899-1 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 3,636 3,032 2,951 4,217 4,232 2,929 427 845 69,801 2,001 1,410 1,689 1,665 1,883 3,033 3,618 4,106 3,970 3,455 2,657 909 69,717 899-2 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 1,777 3,027 3,661 4,040 3,987 3,446 2,657 2,660 69,599 2,001 1,410 1,689 1,665 2,643 2,989 3,803 4,075 3,950 3,531 2,690 2,567 69,842 899-3 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 1,867 3,799 3,863 4,141 4,016 3,586 2,787 2,492 70,303 2,001 1,410 1,689 1,665 1,867 2,507 4,839 3,625 3,476 3,151 2,052 2,575 67,113 899-4 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 1,867 2,507 1,919 45,598 2,001 1,410 1,689 1,665 1,867 2,507 - - 45,598 900-1 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 1,867 2,507 -3,661 -4,040 45,598 2,001 1,410 1,689 1,665 1,867 2,507 45,598 900-2 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 1,867 2,507 45,598 2,001 1,410 1,689 1,665 1,867 2,507 45,598 900-3 978 867 1,934 1,400 2,381 2,001 1,410 1,689 1,665 1,867 2,507 45,598 2,001 1,410 1,689 1,665 1,867 2,507 45,598 900-4 978 867 1,934 1,400 2,381 -610 -613 -246 -2,501 -776 -1,292 -8,527 -23.4% -30.3% -12.7% -60.0% -29.4% -34.0% -12.1% 901-1A 978 867 1,934 1,400 2,381 102 901-2 978 867 1,934 1,400 2,381 901-3 978 867 1,934 1,400 2,381 901-4A 978 867 1,934 1,400 2,381 902-1 978 867 1,934 1,400 2,381 902-2 978 867 1,934 1,400 2,381 902-3 978 867 1,934 1,400 2,381 902-4 978 867 1,934 1,400 2,381 978 867 1,934 1,400 2,381 978 867 1,934 1,400 2,381 978 867 1,934 1,400 2,381 978 867 1,934 1,400 2,381 978 867 1,934 1,400 2,381 978 867 1,934 1,400 2,381 978 867 1,934 1,400 2,381 Actual 978 867 1,934 1,400 2,381 - - - - -3,987 -3,446 -2,657 -2,567 +/- -2,248 -1,051 -1,095 -544 -619 %Diff. -69.7% -54.8% -36.2% -28.0% -20.6%

Importance information SOP Program information TSPK’s Requirement SOP Program 1.Supplier send forecast part / Material to Trie#2 & Coil center 2.TSPK plan build stockpile 6,000 unit 3.Preparation packing standard for delivery 4.Delivery 100% on time 103

Quality Control Ms. Paradee Somsuk QC AMGR, Thai Summit PK Group March 4th, 2022 My Quality Declaration “I will deliver the highest quality products and services. To meet the customer's required specification & ultimate satisfactions” “ดฉิ นั จะสง่ มอบผลติ ภณั ฑแ์ ละใหก้ ารดแู ลลกู คา้ ดว้ ย คณุ ภาพดที ส่ี ดุ เพอื่ ตอบสนองความตอ้ งการและสรา้ ง ความพงึ พอใจอยา่ งสงู สดุ ใหก้ บั ลกู คา้ ”

Quality Weekly Meeting Agenda 1. Supplier quality score evaluation manual Y2022 1.1 Target Y2022 1.2 Quality evaluation score manual Y2022 2. Quality performance Y2021 2.1 Supplier quality score evaluation result 2.2 Top 10 supplier 2.3 Supplier trend 2.4 Lessons learned quality issue 3. Quality activity Y2022 4. Contact person 4.1 TSPK Contact 4.2 Supplier contact 105

1. Supplier quality score evaluation manual Y2022

1. Supplier quality evaluation manual Y2022 1.1 Target Y2022 “A” *** A level = Supplier evaluation score 99 points up 107

1. Supplier quality evaluation manual Y2022 1.2 Quality evaluation score manual Y2022 *** The period from the 26th day of the immediately preceding period through the 25th day of the current period. 108

1. Supplier quality evaluation manual Y2022 1.2 Quality evaluation score manual Y2022 40 S1 : Claim (PPM) < 10 PPM 20 S2 : PDR & 8D reply 1 PDR + Reply 8D within due date 20 S3 : Problem frequency No repeat issue + No disruption TSPK 20 S4 : Co-operation Support activity 100 S5 : Field claim Without field claim 109

1. Supplier Quality Evaluation Manual S1 : Claim ( PPM ) - 40 Points Claim ( PPM ) = FY2021 Target ≤ 20 PPM Start : April 2022 FY2022 Target ≤ 10 PPM Claim PPM Score Reduce PPM Target from Claim PPM Deducts Score < 20 30 20 PPM to 10 PPM < 10 0 21 - 120 29 - 20 and change PPM Range >10 - 60 - 10 121 - 220 19 - 10 >60 - 110 - 20 221 - 320 >110 - 160 - 30 9-0 - 40 > 320 0 > 160 110

1. Supplier Quality Evaluation Manual S2 : Number of PDR Issue and 8D Report reply - 20 Points S2 = S2.1 + S2.2 = -20 Point S2.1 : Number of PDR Issue -10 Points PDR issue Score Start : April 2022 PDR issue Deduct Score 1 9 1 0 2 8 2 -2 3 7 3 -4 4 6 4 -6 5 5 5 -8 6 4 ≥6 -10 7 3 8 2 No deduct score 1st Issue 9 1 If over deduct score 2 points / PDR ≥10 0 *** Major case within 3 Days / Minor case within 7 Days *** S2.2 : 8D Report reply -10 Points 8D Report Reply Within Due date Over 1 Week Over 2 Weeks Over 3 Weeks Deduct Score 0 -2 -4 -10 111

1. Supplier Quality Evaluation Manual S3 : Problem Frequency - 20 Point S3 = S3.1 + S3.2 + S3.3 = -20 Point S3.1 : Q’ty of Problem Type ≤ 1Type / Month Q’ty Problem 1 2 3 4 Deduct Score 0 -2 -4 -6 S3.2 : Q’ty of Repeat problem time “No repeat problem” 3 4 -6 -8 Repeated Time 0 1 2 Deduct Score 0 -2 -4 S3.3 : Q’ty of disruption TSPK line “No disruption” Disruption 0 1 Deduct Score 0 -6 New addition Evaluation Criterial *** Supplier must be accept claim only *** 112

1. Supplier Quality Evaluation Manual S4 : Co-Operation & Counter Measurement - 20 Points 4.1 Inspection data - Supplier need to submit monthly inspection data within 25th day. And in February for yearly inspection / annual test. Item Frequency Due date Data Type Monthly inspection data 1 / Month Before 25th Electronic file Full Layout 100% on Dwg. 1 / Year February Electronic file ELV. Regulation (SoC) 1 / Year February Electronic file - Sending data support Over target or Not send Over due date 1 Month 2 Months continue 3 Months continue Over 3 Months -15 Points continue Deduct Score -5 Points -10 Points - 20 points 4.2 Support in TSPK activity - Co-operation in countermeasure problem and support sorting & Repair - Process and product audit : preparation of document and process , including concern person support - Co-operation for new model / ECN : PPAP submission - Process change information : If RPCA. Submit to TSPK less than 4 weeks before SOP. 4.3 Containment action - Quality alert reply within 24 hours and 1st lot information *** If Supplier any feed back over due date deduct score 5 points / Case*** 113

1. Supplier Quality Evaluation Manual S5 : Field Claim *** Supplier must be accept claim only *** S5 Case of field claim at our customer - Customer Disruption - Customer Field return - Customer Notification Case of field claim Domestic parts CKD Parts Deduct Score -5 Point -35 Point 114

2. Quality performance Y2021

2. Quality performance Y2021 2.1 Supplier quality score evaluation result Y2021 Overview of TSPK-G Target > 99 points 100 99.62 99.64 99.91 99.93 120 99.31 100 99.16 99.46 99.26 98.74 99.02 98.93 98.73 98.73 80 95 60 40 20 90 0 JAN JAN FEB FEB MARMAR APRAPR MMAYAY JJUUNN JJULL AAUUGG SESPEP OCTOCT NOVNOV DEC DEC AVG. AVG. 116

2. Quality performance Y2021 2.2 Top 10 supplier P1 P4 117

2. Quality performance Y2021 2.3 Supplier trend BMW PTA SPA KLK 98.8 99.2 99.7 99.3 97.2 98.5 98.5 97.6 98.7 99.0 99.2 96.5 2019 2020 2021 2019 2020 2021 2019 2020 2021 2019 2020 2021 Up trend : Suppliers which have a better trend Down trend : Suppliers which downward trend and success to reach the target. “Keep going” over the past year. “Mind your trend” HUAMEI TYL UHM TSAT4 98.8 97.9 98.6 96.55 95.4 96.0 96.7 96.4 96.2 93.4 94.2 2021 93.3 2019 2020 2021 2019 2020 2021 2019 2020 2021 2019 2020 Side way : Suppliers which inadequate improvement continue 3 past year. “Let’s start now” 118

2. Quality performance Y2021 2.4 Lessons learned quality issue (Dimension) Detail Problem Details : BRKT ASS’Y ENGINE LH 1) Engine LH trim line out off spec. 2) Engine LH dimension out off spec. Effect for This Problems 1. Deduct Score 35 points & Problem recurrent 5 points 2. Lost cost for sorting and reworked 1,936,110 Baht (Still Sorting & Rework) Mission  QC D No. Process Problem Root cause Improvement  In-Charge Description Jan’22 Feb’22 Mar’22 Apr’22 Status   Merit / Advantage 119 1. Press 1.On July 02nd'2019, K. Fernandez 1.At the Stamping process 1. Die F1+Pi UHM adjusted Mr. Pongphon  - No complain by 31/07/19 customer Pablo notified Engine LH trim line F1+ Pi stopper die damage distance the stopper & die F2 out off spec. was 14.00 mm, which &F2 pad cushion was loose process UHM developed insert it does not meet the specified. due to haven’t PM check die by welding and grinding 2.On November 19'2020 K. Pablo sheet. refer to CAD to solve the die 31/07/19 Marafuschi notified Engine LH 2. Insert die upper/Lower 3/5 was loose. 30/03/22 dimension out off spec. & 4/5 damage due to haven’t 2. Make PM check sheet and Mr. Pongphon  PM on plan. traing. 3. New insert die upper/Lower Mr. Sarawut 3/5 & 4/5

2. Quality performance Y2021 2.4 Lessons learned quality issue (Appearance) Detail Detail / Problem : BRKT LOWER ARM is crack. Effect for this problems 1. Deduct score 1 point. 2. Lost cost for sorting 12,696.91 Baht No. Process Problem Root cause Improvement  In-Charge Mission  Description July 21 Aug 21 Sep 21 Oct 21 Status   QC D Merit / Advantage 15/10/21 15/10/21 1. ASSY Full BRKT LOWER ARM is Component part thickness reduce - Adjust position die and lock pin Mr. Tanigpong  No complain by 15/10/21 weld. crack on 12/01/2021 Q'ty lower spec due to die insert die can to insert die. customer 120 1 U' shifting and daily check die not have - Revise daily check die add point check. point check. - Addition point check thickness reduce on check sheet.

2. Quality performance Y2021 2.4 Lessons learned quality issue (Dislocation weld) Detail Detail / Problem : Saddle Spring 4x2 Weld dislocation of bead. Improve clamp for lock parts Effect for this problems 1. Deduct score 5 points. Problem Repeated 2 times 2. Lost cost for sorting 18,384.10 Baht Mission  Description QC D Merit / Advantage No. Process Problem Root cause Improvement  In-Charge Jan 21 Feb 21 Mar 21 Apr 21 Status   7/01/21 121 1. Welding Q-Gate Axle TSPK-L - Clamp lock Jig assembly loose due - Improvement clamp lock jig Mr. Tanigpong  - No complain by 7/01/21 customer 7/01/21 Assembly. Found Problem Saddle to not have daily check jig and PM assembly. 7/01/21 spring 4x2 weld Plan. - Make daily check jig add point dislocation of bead date check clamp before production. 12/11/20 Q’ty 10 U' - Make PM Plan - Add process 100% check appearance weld.

2. Quality performance Y2021 2.4 Lessons learned quality issue (Wrong assembly) Detail Detail / Problem : MEMBER ASSY-CROSS,FR Position nut NG. Effect for this problems Deduct score customer claim 5 Point No. Process Problem Root cause Improvement  In-Charge Mission  Description Mar21 Apr21 May21 Jun21 Status   QC D Merit / Advantage 1. Welding Customer Information -Locator pin control of assembly jig is - Change Locator pin control of Mr. Wannipa  -No complain by 29/03/21 customer 29/03/21 Assembly. MEMBER ASSY- wear due to PM check sheet not assembly jig CROSS,FR Position nut have point check. - Revise PM check sheet add NG effect to process point check diameter pin assembly at customer on control. 27/03/2021 122

3. Quality activity Y2022

3. Quality activity Y2022 Top 5 suppliers  Countermeasure present 1st month : MGR 2 month cont. : GM 3 month cont. : MD / President “Q” up  Weekly follow up  Measuring system development  Process audit  Customer requirement : CQI, Safety part audit Critical part audit  Product audit Dimension Weld performance Appearance 124

4. Contact person

4. Contact person 4.1 TSPK-G Contact Plant Product group No. Name Position E-mail Axle group 1 Mr. Jaturaporn Pumsakuln MGR QC [email protected] 2 Mr. Nattaporn Pomdee STAFF QC [email protected] TSPK FORD Frame group 3 Mr. Rangsan Chanya SUB FOREMAN QC [email protected] 4 Mr. Prachuab Rodyim FOREMAN QC [email protected] ISUZU Frame group 5 Ms. Paradee Somsuk AMGR QC [email protected] 6 Mr. Sarawut Suya STAFF QC [email protected] TSPK-BP All parts model 7 Mr. Warit Phudtho LEADER PQC [email protected] TSPK-L All parts model 8 Mr. Banluesak Somton LEADER PQC [email protected] 9 Mr. Natthaphon Prathumthong AMGR QC [email protected] 10 Mr. Nanthapong Changhin STAFF QC [email protected] 11 Mr. Manit Khamkula FOREMAN QC [email protected] 12 Mr. Pratuan Khumnenr FOREMAN QC [email protected] 1 Mr. Akekachai Inthajak MGR QC [email protected] 2 Mrs. Wannipa Dachmala STAFF QC [email protected] 3 Mr. Jakkaphol Lakchai SUB LEADER PQC [email protected] 1 Mr. Narathip Pakkunnan MGR QC [email protected] 2 Mr. Tanigpong Mayom STAFF QC [email protected] 3 Mr. Santi Thongkorn CHIEF LEADER PQC [email protected] 126

4. Contact person 4.2 Supplier Contact Please submit TSPK within 30 Mar 2022 127

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