the delay. Therefore, the Company considered to record allowance for doubtful accounts with total amount of such unbilled 3 Months 2019 2018 Change 2019 2018 Change 2019 2018 Change Engineering 196 167

E_1 Legal_FA_2015_12_29-c A CorpL4.1hig A Executive Summary of Management Discussion and Analysis 1 For the Year Ending December 31, 2019 Thai economy in 2019 showed decelerating growth at 2.4 percent compared to 4.2 percent in the previous year.The slowdown could be attributed to exports which contracted further due to the stronger Baht and a global economic slowdown. In addition, the investment environment of both the public and private sector remained weak, and private consumption, albeit gro...

E_1 Legal_FA_2015_12_29-c A WWCCoorrppLL44..11hhiigg A Executive Summary 1 Management Discussion and Analysis For the Year Ended December 31, 2017 In 2017, Thai economic growth gained traction, buoyed by strong recoveries in tourism and exports. This growth momentum is expected to carry on into 2018, especially amid a brighter outlook in public and private investment. Nonetheless, the business sector remained challenged by new modes of competition in a broader marketplace amid the advancing digi...

E_1 Legal_FA_2015_12_29-c A WCorpL4.1hig A Executive Summary of Management Discussion and Analysis 1 For the Year Ending December 31, 2018 In 2018, the overall Thai economy maintained its growth due largely to healthier growth of exports and tourism, especially in the first half of the year. Meanwhile, the government continued to implement measures to promote and strengthen the domestic economy through support of investment and private spending as well as bolstering opportunities for other econo...

Quality, Accounts Receivable Aging, Provision and Sufficiency of Allowance for Doubtful Debts The Corporate Group’s trade accounts receivable and other accounts receivable as at December 31, 2018 account

Allowance for Doubtful Debts The Corporate Group’s trade accounts receivable and other accounts receivable as at December 31, 2019 account for 15.54 percent of the total assets with 78.69 percent not yet due

Administrative Expenese due to accounting adjusted of doubtful debt amounted of Baht 22.5 million in 1Q2018 and professional fee for new projects according business plan; ii) 10.5% decrease of Other Income from

major receivables, which was famous automobile manufacturing companies in Thailand. As a result, the Company did not set the allowance for doubtful accounts. Average days sales of inventory were 20 days

Receivable Aging, Provision and Sufficiency of Allowance for Doubtful Debts The Corporate Group’s trade accounts receivable and other accounts receivable as at December 31, 2017 account for 18.04 percent of

others. As at 31 December 2017, the company and its subsidiaries recorded allowance for doubtful accounts totaling 99.0 million baht, increased from 2016 and 2015 of 182.1 million baht and 157.2 million