DESIGN OF A WEB-BASED SALES DECISION SUPPORT SYSTEM USINGTHE DOUBLE EXPONENTIAL SMOOTHING METHOD (CASE STUDY:UMKM TAPE MAYANG MADU JEMBER). (2025). Jurnal Penelitian Sains Dan Teknologi Indonesia, 4(2), 574-583. http://jpsti.jurnal.unej.ac.id/index.php/JPSTI/article/view/20