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>0 -5& &3 0  5&-0  Principles of Production and Operations / Operations Management_ +. &. 7 7$5 B %3 ;(











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                          ‡ ¤‡ªµ¤Áš¸É¥Š˜¦Š Validity
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                          ‡ ¤‡ªµ¤®¤µ¥
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                          ‡ œµÅžÄÅ—Šµ¥          ใช้สําหรับ
                          ‡ ´œš¹„Ážœ¨µ¥¨´„¬–°„¬¦
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                                           r
                         เอกสารนี้
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                                              ·
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                          1. Áš‡œ‡„µ¦¡¥µ„¦–ÁŠ‡»–£µ¡(Qualitative method)
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                             ± „µ¦¡¥µ„¦–‹µ„‡ªµ¤‡·—Á®œ (Judgment method)
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                          2. Áš‡œ‡„µ¦¡¥µ„¦–ÁŠž¦¤µ–(Quantitative
                              method)   rรเรีย
                             ± „µ¦¡¥µ„¦–‹µ„­µÁ®˜» (Causal method)
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                               ‡   Cross-section
                             ± „µ¦ª·Á‡¦µ³®°œ»„¦¤Áª¨µ (Time-series analysis)








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