Supplier Annual conference 2022

Purchasing Strategy 2022 2. e-Supplier evaluation (on System) Improvement : Limitation of Supplier evaluation Program 2.1 FY2022 Activities Version Excel 1. Automatic Price Adjustment Program Improvement : The Limitation of Program Version Phase1 Interface Data to Concern Multi Program Benefit 1. This program can integrate to e-Application & SL9. Benefit 1. Reduce working time 4 to 1 day 2. Reduce working time 723 hr./Year. (Est 0.1MB/Year) (Cost saving 0.022 MB/Y) 49

Accounting Department 2.1 FY2022 Accounting Activities Activity 2022 1. Customize e-Billing Accounting Department has created additional condition in the e-billing system for support the billing for term of payment. Start project March 2022 2. e-Tax invoice / e-Receipt 50

Accounting Department 2.2 Calendar and Credit Term of Billing TSPK Group TSPK Jan-22 Feb-22 Mar-22 Apr-22 May-22 Jun-22 Jul-22 Aug-22 Sep-22 Oct-22 Nov-22 Dec-22 วนั ทรี่ บั วางบลิ 4-6 1-3 1-3 1,4-5 3-5 1-2,6 1,4-5 1-3 1,2-5 3-5 1-3 1-2,6 วนั ทโ่ี อนเงนิ , รบั เช็ค 15/02/2022 15/03/2022 18/04/2022 17/05/2022 15/06/2022 15/07/2022 15/08/2022 15/09/2022 17/10/2022 15/11/2022 15/12/2022 16/01/2023 51

Supplier Annual Conference 2022 3. Purchasing Policy and CR Activity

Purchasing Policy and CR Activity 2022 Cost Reduction Policy Cost Reduction Challenge ❖ New price structure cost ❖ Scrap return policy Cost Reduction Program DCR Meterial Mill Part Complexity Price LTA VA/VE Negotiation Total 6% Part Price Actual Check Gap Weight MCRT NDCR Packaging Delivery Activity Activity Process Improvement Actual Check 53

Purchasing Policy and CR Activity MCRT Performance History MCRT Weight Reduce Performance MCRT Activity’2021 68 Idea ❖ Total Idea : 68 Idea ❖ Success : MCRT Activity’2022 28 Idea 23 Idea ❖ Total MCRT Idea : 78 Idea ❖ MCRT Idea Success : 71 Idea ❖ Total Gang Die : ❖ Gang Die Success : 54

Supplier Technical Assistance performance Mr. Manop Kumdach Manager, Thai Summit PK Group March 04th, 2022 My Quality Declaration “Quality is the First” “คณุ ภำพตอ้ งเป็ นหนึ่ง”

STA PERFORMANCE Agenda 1. Result of Supplier Performance 2021 ❖ Evaluation Score Q, D and C ❖ VMI Performance 2021 2. Our activities in 2022 3. Information in 2022 ❖ Supplier Evaluation Score Policy ❖ Supplier Award Policy and criteria ❖ Supplier Performance Award 2021 ❖ Engineering information

1. Result of Supplier Performance 2021 1.1 Evaluation Score Q, D and C 40 2021 evaluation score Score 98 = 4, Score 97 = 1, Supplier 10% Supplier 3% 2 1 1 4 35 4 17 30 16 Score 96 Score 97 Score 99 = 17, Score 100 = 16, 25 Evaluation 2021 Score 98 Supplier 45% Supplier 42% Score 99 20 22 Score 100 15 57 10 58 Score 100 Score 99 Score 98 Score 97 0 Evaluation 2020 In recent year, there are 39 suppliers who have achieved performance goals and only one has not (UHM).

1. Result of Supplier Performance 2021 1.2 VMI Performance 2021 In the year 2021, there was a total VMI’s problem of 28 77 86 1906 case, divided into 9 types of case. 111 • TEMPORARY ORDER 993 Case 117 • WRONG INVOICE 232 Case • WRONG DS 141 Case 121 • DS & INV WRONG Q’TY 121 Case 993 141 • DS & INV WRONG PRICE 117 Case • WRONG PO 111 Case 232 • DS & INV WRONG ITEM 86 Case • NO DS 77 Case • OTHER 28 Case OTHER NO DS Corrective action DS & INV WRONG ITEM WRONG PO • Set up plan and discussions to improve VMI's problems. DS & INV WRONG PRICE DS & INV WRONG Q'TY • Supplier present corrective action plan. WRONG DS WRONG INVOICE • TSPK expect supplier to reduce 50% of VMI problem in TEMPORARY ORDER period from last year. 58

Supplier Annual Conference 2022 2. Our activities in 2022

Our activities in 2022 2.1 CQI-15 and PPAP Activity 2022 2023 No Activity 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 Customer Ford CQI-15 MY20 PPAP P703 MY20 PPAP P703 (FSAO) MY20 PPAP U704 MY20 PPAP P703R 2 Customer MMTh MMTh welding standard PPAP UT(5F00) Improvement plan to support problem activities • Follow up supplier concerned issue with QC and Engineering TSPK-G. 60

Our activities in 2022 2.2 PPAP Status As everyone knows the Production Part Approval Process (PPAP) is a framework of requirements used in the TSPK and automotive supply chain to establish confidence in products and their manufacturing processes. PPAP’s schedule Model Total Completed Remain Complete Target P703 (HR) 108 item 78 item 30 item 31 March 2022 P703 (LR) 60 item 0 item 60 item 31 March 2022 P703 (FSAO) 113 item 0 item 113 item End April 2022 131 item 0 item 131 item Within April 2022 U704 P703R 118 item 0 item 118 item Within May 2022 5F00 146 item 0 item 146 item Within February 2023 Request TSPK's supplier support. • Submit documents for approval according to TSPK's requirements. • Verify documents before sending them to TSPK as commit time. (Some supplier) • Parts will approval base on result of fitting gap on frame. 61

Supplier Annual Conference 2022 3. Information in 2022

Information in 2022 3.1 Supplier Evaluation Score Policy 2020 2021 2022 2023 2024 Description 0 Case 0 Case 0 Case 0 Case 0 Case 99% 100% 100% 100% 100% Safety (Serious case) 90% 90% 90% 90% 90% Quality 100% 100% 100% 100% 100% Costs 98% 98% 98% 98% 98% Delivery 98% 99% Target - - - Actual Case lower score target of month. Time #1 : Supplier submits improvement plan in format of \"Performance verification tracking\". Time #2 : Supplier submits improvement plan in format of \"Performance verification tracking\" and presented by the relevant management level. Time #3 : Supplier submits improvement plan in format of \"Performance verification tracking\" and presented by the relevant top management level. Noted : If the score is lower target for 3 consecutive months. Supplier will not be eligible to receive RFQ. 63

Information in 2022 Excellence Award Criteria 3.2 Supplier Award Policy for 2022 Award recipients will be determined based on an evaluation of their performance during 2022. The scoring criteria will evaluate supplier Partnership performance in specific measurable parameters (Score S, Q, D, and C). Key suppliers Potential suppliers Safety “0“ Serious accident case (S) TSPK-G CRITERIA Quality performance (Q) Delivery performance (D) Commercial performance (C) Achieve 100% TSPK-G targets continuous 12 months. The award will be announced from January to March with the \"TSPK-G Supplier Annual Conference 2023\" Benefit • Giving the opportunity to get consideration first in business share. • Improve business relationships to Partnership and Strategic Partnership. Noted : If the score is lower target for 3 consecutive months. Supplier will not be eligible to receive RFQ. 64

Information in 2022 3.3 Supplier Performance Award 2021 According to the conceptual to stimulate incentives for supplier potential development. Supplier performance awards are a potential way to stimulate supplier’s motivation though not always in the intended direction. The Supplier Performance Awards program recognizes suppliers involved in performance on 4 aspects (Safety, Quality, Delivery and Commercial) whose successes made a difference in helping TSPK-G achieve the goals according to the strategic route map, increased revenue or performance results, and who have consistently exhibited a collaborative business relationship with the TSPK-G. THIS SUMMIT PK GROUP I would like to thank the partnership that got the \"Excellence Award\" 2022 which performs an excellent performance in Safety workplace, Quality, SUPPLIER EXCELLENCE AWARD Delivery and Commercial in recent year. 2022 I would like to ask you to maintain an excellent performance forever. Awarded to Mr.Manop Kumdach STA Manager MAHAJAK INDUSTRY CO.,LTD In recognition of outstanding achievement in all areas of supplier performance Quality, Delivery, Commercial relationship and Safety workplace MR. Vitedmytri Lekakul TSPK-G President 65

Information in 2022 3.4 Engineering information (Master Plan New Project) 26 Jan'22 26 Jan'22 Plant Project name KU' / KU' / Investment Investmen2t020 20220021 2021 2022 2022 2023 2023 2024 REVIEW L Project name SOP SOP Q3 (KB) Q4 QQ42 QQ13 QQ24 QQ31 QQ42 QQ13 QQ24 QQ31 QQ42 QQ13 QQ24 QQ31 2024 Y Y (KB) QQ13 QQ24 QQ31 Q42 Q3 Q 1 20TF AXLE 20TF AXLE line 1 SOP O 1 (RG01 AXLE) 443 Oct-19 443 O1c1t2-1,7907 112,707 / line 2 Feb'2 (RG01 AXLE) 20TF FRAME 20TF FRAME line 1 SOP O 22 443 Oct-19 443 1O,1c3t9-1,6917 1,139,617 / line 2 Feb'2 (RG01 FRAME) (RG01 FRAME) 3 RG01 FRAME3 CAPRUGP01 FRAME C4A6P1 UP May-21 461 M1a4y5-2,0148 145,048 RG01 Capacity uRpGS0id1eCAapssayciLtiyneupplSaindemAosdsiyfyLiFnienipshlaonnmDoedci'f2y1F(iSntiasthuosnSODPe)c'21(Status SOP) S/MBR CAP postpone ne 4 RG01 AXLE C4AP URPG01 AXLE CA4P1U4P Dec-21 414 D2e5c6-2,3125 256,325 SOP RG01 AxleSAOPssy LRiGne01plAaxnlemAosdsiyfyLiAnperpill2an1 ,mAoudgif2y1A,Mp/rCilS2TD1. ,PlAanuIgns2ta1ll,MJu/lyC2S2T'D(S.tPaltauns IMnsatkailnl Jgu)ly 22'(Status Making) 5 TRSJ0P1KAXLE 5 RJ01 AXLE 55 Nov-20 55 No9v2-2,1014 92,114 Start SOP NovS2ta0r2t0SPOrPelNimoivn2ar0y203 Pmreolnimthin(aNroyv3'2m0,oDnetch'2(N0,oJva'2n0'2,1D)ec'20, Jan'21) 2,924,204 6 P703 (FORD6MY20PF7R0A3M(FEO) RD MY17204 FRAFMeEb)-22 174 2F,9e2b4-2,2204 1,109,875 Status : No.1 Plan SOSPta1tuFseb: N22o.1 Plan SOP 1 Feb 22 DCV deliver tooling order 433,977 SOP SOP pSlOanP Feb 20S2O2P plan Feb 2022 No.2 Quality Trial No.2 Quality Trial week) 248,387 U704 U704 2,155,000 DCV deliver 745,701 7 (FORD 7 MY20 FR6A4ME) May-22 64 1M,1a0y9-2,8275 244,420 SOP SOP plan SMOPay 20S2O2P plan May S2ta0t2us2: TT ,PP ProduStcatitouns a:ndTTDe,PliPvePryodFiuncitsihon and Delivery Finish tooling order MY20 FRAM(FEO) RD week) 8 P703 REDBACK P703 REDBACK SOP SOP plan SMOPay 20S2O2P plan May S2ta0t2us2: TT ,PP ProduStcatitouns a:ndTTDe,PliPvePryodFiuncitsihon and Delivery Finish DCV deliver 8 FR2A2ME) May-22 22 M4a3y3-2,9277 tooling order (FORD MY20 FRAM(FEO) RD MY20 week) 9 MY20 (P703,U704,PM7Y0320R()PD7C03V,U704,P703 R) DCV Start DCV delivery pSltaanrt3D1C0VUd' erelivv.etroy 2p9la2nU3'1300U6' ,reRve.vt.o3 2to9231U0' U3'0,R6e,vR.4evD.3eltivoe3ry10plUan',R36ev3.4U'DReelviv.5erDyeplilvaenr3y6p3laUn'R3e6v3.5U'De 9 PROTOTYPE 292 Aug-20 292 A2u4g8-2,3087 PROTOTYPE Rev.6 Delivery planR3e7v0.6U'D( e2l0iv2e0ryDpel.afnin3is7h0 1U8'(12U0'20, 2D0e2l.1fiDnieslh. f1in8i1shUF' r,a2m0e214D3eUl. fSintaisthusFFrainmiseh1M43oUdeSltuaFtuinsisFhin4is8hUM' odel 10 UT FRAME 10 UT FRAME 183 Feb-23 183 2F,1e5b5-2,0300 PJ PL PJ PT PLPP SOPPT PP SO-- TPPSKPJKT-LoToolionlginDgiejigTrainald Die - PKJ Tooling Die Trial and improve for PJ Lot PLPP -TTrSiaPlKa-nLdToimolpinrgovjiegfaonrdPDJ LieotTrial PJ SOP plan Feb 2023 SOP plan Feb 2023 L TSPK-L DCV PJ 11 UT AXLE 11 UT AXLE 183 Feb-23 183 F7e4b5-2,7301 PT SOPPT PP SO-PPKJ Tooling Install - PKJ Tooling Install PL DCV SOP plan Feb 2023 - TSSPOKP-L pTolaolninFgejibg a2n0d2D3ie-TTrSiaPlKa-nLdToimolpinrgovjiegfaonrdSDupieorTtrDiaClVanadnidmPpJropvaertfor Suport DCV 12 H60A FRAM1E2MY19H,620A(LFCRPA)ME M7Y519,20 (ALuCgP-)20 75 A2u4g4-2,4020 SOP SAF plan SOSPONPoSvA'2F0pPlarnelSimOiPnNaroyv3'2m0 oPnrethlim(Ninoavr'y203, mDeocn't2h0,(NJaonv''2210), SDteactu'2s0C, lJoasne'2P1li)mStatus Close Plim 13 H60A AXLE 1M3Y19,2H06(0LACPA)XLE MY2109.,120 (LCJPa)n-22 20.1 Ja3n0-2,8283 30,883 SOP TSPK SubmSOitPQuataTtiSoPnKfoSur bRmFIitoQcuuasttaotmioenrfornR1F7I tMo acuy's2t1omer on 17 May'21 P TSPK-BP 134,000 SOP SAF plan SOSPOAPuSgA'2F0pplaonstSpOoPneAuJagn'2'201postpone Jan'21 14 H60A Frame1S4AF H60A Frame SAF28 Nov-20 28 N1o3v4-2,0000 15 W60D 15 W60D 90 May-25 90WaitMcoany-fr2im5 Wait confrim - W60D Submit -QWuo6t0aDtioSnubRmFI ittoQcuuosttaotimonerRTFSIPKStEEPo-N20c2R2uesvitsoe mToeolrinTgSVPcoKCSEsEPt-N2a0n2R2devpisaertTcooosltinsgeVncotCsttoPa2MTndK 2p3arJtuclPyoTs(tRsFeI)nt toVFCP2MT KS2O3PJulPy2T (RFI) F SOP V Dwg Release Dwg Release 2 C 66

Supplier Annual Conference 2022 Mr. Somchai Rattanamongkolkul Safety Manager, Thai Summit PK Group March 04th, 2022 My Safety Declaration “Zero accident all work process.” “อบุ ตั เิ หตตุ อ้ งเป็ นศูนย ์ ทุกกระบวนกำรปฏบิ ตั งิ ำน”

TSPK-G Supplier safety Practices 2022 TSPK-L TSPK-E 4 Plants TSPK TSPK-BP 68

TSPK-G Request to Supplier must do Measures to prevent the spread of COVID-19 Measures to prevent the spread of COVID-19 For suppliers contacting or operating within TSPK-G companies .... Suppliers who come to contact or work before entering the company must do the following: 1. Must be vaccinated against COVID or ATK test results. 2. Must wear a medical mask or cloth mask all the time when entering the company. 3. Must check the body temperature at the security guard every time before entering the company. 4. In case the temperature exceeds 37.5 degrees, it is not allowed to enter the company. 5. Have to wash your hands with alcohol gel at the security guard. 6. Keep a social distance of at least 1 meter. 7. Enter- Exit the company area according to the specified route. 69

Covid-19 : Situation : in TSPK-G 70

Covid-19 : Situation in TSPK-G Number of Infected TSPK-G Type of Infected 16 20 60 52 50 2 40 18 30 20 33 24 10 24 6 23 7 13 1304 19 32 10 2 8 11 14 0 02 9 14 4 2 7 5 22 3 2 Jun Jul Aug Sep Oct Nov Dec,2021 Jan,2022 Feb,2022 134 TSPK 1. ATK Proactive screening TSPK- L TSPK- BP Total 2. Work place 3. Daily life TSPK-G Vaccinated ATK Proactive Screening 3000 2632 3,500 2,674 3,293 2500 91.0% 3,000 431 521 2000 2,500 888 1500 430 1883 65.1% 480 261 2,000 1,350 1,251 1188 930 1000 359 1,500 1,355 199 204 1584 105 1522 873 13 16.6% 143 9.0% 1,000 396 403 500 317 206 6 111 346 0 340 not vaccinated 500 755 644 479 Needle 1 Needle 2 108 - Feb,22 Needle 3 Oct,21 Nov,21 Dec,21 Jan,22 Management ST-CS Leader Worker Subcontrac TSPK TSPK- L TSPK- BP Total 71

More Actions on COVID -19 Prevention : in TSPK-G Establish an emergency committee prevent covid-19 Improve the screening form for outsiders from documents to QR codes plan Before After Start in mid-March 2022. 72

Safety regulations that the supplier must comply with. 1. Contact to exchange card at the security guard. 2. All PPE equipment must be worn at all times when entering the company. 3. Do not wear slippers and shorts inside the company. 4. No smoking in designated areas. 5. Do not do anything that creates sparks. 6. Do not gamble within the company. 7. Do not bring all kinds of weapons into the company. 8. Do not drink alcohol or drugs. Into the company. 9. Drive no more than 10 km./hour and park in the designated spaces only. 10. Do not bring unrelated persons into the company. 11. Do not sleep or eat in the factory. 12. Parking the car support wheels, cones and turns off the engine every time. 13. Do not take photos or video clips within the company. 14. If there is an accident make The company's property damage must notify security personnel immediately. 73

TSPK-G Request to Supplier must ware PPE Supplier Helmet Do not use To use Card Reflective clothing Safety shoes 74

TSPK-G Request to Supplier must do Safety Culture Walk way Pointing finger Take the crosswalk Do not walk Not a phone before crossing pickpockets while walking the road 75

Accident & Fire : TSPK-G Summary Accidents at work of TSPK-G in 2021 ACCIDENT AT WORK Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 2021 ACCIDENT AT WORK : 2021 TSPK Serious 00000000000 0 0 10 TSPK-L Slight 00000000001 0 1 9 TSPK-E Normal 00001000100 0 2 8 TSPK-BP Fire 00000000000 0 0 7 TSPK-G Serious 00000000000 0 0 6 Slight 00000000000 0 0 5 Normal 00010000000 0 1 4 Fire 00000000000 0 0 3 Serious 00000000000 0 0 2 Slight 00000000000 0 0 1 Normal 00000000000 0 0 0 Fire 00000000000 0 0 Serious 00000000000 0 0 Serious Slight 00000000000 0 0 Slight Normal 10100001000 0 3 Fire 00000000000 0 0 Normal Serious Fire Slight 00000000000 0 0 Normal 00000000001 0 1 Serious Fire 10111001100 0 6 Slight 00000000000 0 0 Normal Fire Serious Slight Normal Fire Serious Slight Normal Fire Serious Slight Normal Fire TSPK TSPK-L TSPK-E TSPK-BP TSPK-G Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 76

Supplier Annual Conference 2022 Mr. Ratthakiat Sarageng Director, Thai Summit PK Group March 4th, 2022 My Quality Declaration “We will not Receive, Make and Deliver the Defected product” “เรำจะไมร่ บั ไม่ทำ และไมส่ ่ง ของเสยี ”

Supplier Annual Conference 2022 Agenda Manufacturing Strategy 78

Manufacturing Strategy

Manufacturing Strategy S : Safety Must = “0” Accident : Internal and External : Incoming-Internal-Customer Q : Quality First = “0” Defected : Incoming-Internal-Customer : Reduce Cost of Poor Quality D : Delivery = 100% : Improvement Activity C : Cost Competitiveness Basis required by : 1. Raising awareness(SQDC) for employee all levels 2. Good Communication Everything must be start by 3. Keep all Customer’s Requirements and Training to all levels Management level 4. Emphasize “Work discipline” and “3S” 80

Manufacturing Strategy S: Safety Must = “0” Accident ▪ KYT for every working day and shift. ▪ Near missed and TSPK safety way. ▪ Safety of each plant meeting once a month by safety and plant Mgr. ▪ Safety of group meeting and sharing once a month by Safety Team and Top management. ▪ Incase has an accident occurred will be immediately reporting to Top management and sharing to all BU. These activities we have implemented and request supplier to implement in activity for achieve the Safety Target 81

Manufacturing Strategy Q: Quality First = “0” Defected ▪ Strong control to enable employees to work according to established procedures. ▪ I Do I Check activity. ▪ Strong controlling for 4 M changed . ▪ Quality Layer Audit activity ( Plant Mgr., Mgr., Staff & LD). ▪ Poka-Yoke and apply to use automation system. ▪ Strong to achieved to all customer’s requirements. These activities we have implemented and request supplier to implement in activity for achieve the Quality Target 82

Manufacturing Strategy D: Delivery = 100% ▪ Efficient communication to suppliers. ▪ Team meeting for 2 shift every day. (SD,PC,PL,PD,QC&MT) ▪ Production dashboard for Mgr. monitoring by real time. ▪ Daily production performance control >95% ▪ Keep FG stock > 3 day for all products and models. ▪ Install QR code system to check the correct frame before delivery. These activities we have implemented and request supplier to implement in activity for achieve the Delivery Target 83

Manufacturing Strategy C: Cost Competitiveness ▪ Challenge plan for CR activity from all departments. ▪ Labor and OH cost will control by each section and share best practice. ▪ Group activity. - Waste walk ( 7 waste, 16 losses, 0 accident) by President 3 month. - CI walk by K J.Sakultorn EVP. 3 month a time. - QCC , Inhouse-defected reduction. - Show and share among TSPK-G and TS-G. ▪ Automation for new project and balancing C/T for current model. These activities we have implemented and request supplier to implement in activity for achieve the Cost Target 84

TSPK-G supplier Annual conference 2022. Mr. Paiwan Pimpakorn MGR. Thai Summit PK Group March 4th, 2022 My Quality Declaration I will control the production plan and maintain sufficient inventory to meet the customer requirements. ผมจะควบคมุ การผลติ และรกั ษาปรมิ าณสนิ คา้ คงคลงั ใหเ้ พียงพอตอ่ ความตอ้ งการของลกู คา้

Production Control Agenda 1. Forecast 2. Evaluation score 3. Criteria score 4. Importance information 86

1. Forecast

Forecast Plant Project Volume 2021 Volume 2022 Up/Down % TSPK-C P375 Frame -68.9% U375 /P375 RB Frame 125,219 38,904 -60.9% Last Production on Apr'2022 TSPK-L P375 AXLE -50.3% Last Production on Jun'2022 TSPK-BP P703 Frame 60,362 23,610 100.0% Last Production on Aug'2022 U704 /P703 RB Frame 100.0% Start SOP on Feb'2022 CKD Part [Pcs] 264,392 131,471 5.8% Start SOP on Apr'2022 RT50 /20TF Frame 42.3% RT50 /20TF AXLE 0 98,131 35.3% The overall product can SU FRAME 11.1% be seen that the volume QX FRAME 0 42,030 31.6% of orders will increase SU QXLE 11.7% from last year. QX AXLE 5,966,059 6,314,850 20.9% H60A Frame 15.1% P60A Frame 291,597 414,926 45.5% AXLE MY14 / LCP 22.7% HINO 323,297 437,561 43.3% CKD South Africa 103.2% 173,537 192,868 30,348 39,943 189,118 211,235 53,952 65,218 43,724 50,338 10,517 15,297 154,051 189,015 5,736 8,217 958,147 1,947,309 88

Evaluation score TSPK-G Delivery evaluate 2021 Rank Score No. of Supplier 55 Rank “A” 100% A 98-100 0 0 Key Target’2022 B 97-85 0 1. No “C” Category 55 2. A Ranking Score up = 100% C 84-65 2.1) Issue order advance 2 day before delivery D 64 Below 2.2) Supplier confirm stock before delivery 1 day & PC follow up Total Result of Score AVERAGE. of FY2021 = 99.63% So good condition. However TSPK’s requests to all supplier consider improvements in Delivery 100% on time, which will lead to an excellent score in the upcoming 2022 assessment 89

3. Criteria score

Criteria score KPI of TSPK-G (2021) KPI of TSPK-G (2022) Evaluation Detail Weight Evaluation score ≥ 99 Point Evaluation score ≥ 99 Point DELIVERY 100 % ON TIME 30 Points PARTS ACCURACY 30 Points AWARENESS 20 Points PACKAGING 10 Points CO-OPERATION (Safety) 10 Points Total 100 Points Rank Score Details 91 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 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec P375 Frame INF. 6 Month EOP U375 Frame P375R Frame INF. 8 Month EOP P375 Axle INF. 10 Month EOP INF. 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 93

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 94 901-2 978 867 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 95

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 ำรดูแลลูกคำ้ ดว้ ยคณุ ภำพ ดที สี่ ุด เพอื่ ตอบสนองควำมตอ้ งกำรและสรำ้ งควำมพงึ พอใจ อยำ่ งสูงสุดใหก้ บั ลูกคำ้ ”

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 97

1. Supplier quality score evaluation manual Y2022