data gathering<br>Researchers divide data collection into two categories.<br>1. Secondary data collection The researchers collected the concepts, theories and related research materials of green products of the construction group by collecting data from academic literature, books and various related websites.<br>2. Primary data collection<br>2.1 Production and sales of green products in the construction industry in Bangkok Province<br>2.2, distribution or production of building materials units and companies to discuss and exchange, seek to strengthen the understanding of correct, safe and environmentally friendly green products, while maintaining creative and natural product development, to achieve quality standards.<br>2.3 400 questionnaires were used to investigate the green consumer groups in Guangzhou's construction industry.<br>Arrangements for action and analysis<br>Preliminary data collected through the use of questionnaires<br>1 Use all questionnaires received to check the completeness of the questionnaires.<br>2. Execute derived query (coding) as defined.<br>3. Process the encoded data, and then bring the records into the computer for data processing, using ready-made statistical programs.
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