20.500.12556/RUP-23479 Discounting one selected item or the whole cart? A theoretical analysis of two mutually exclusive supermarket discount formats Discounting one selected item or the whole cart The article addresses two real-world decision-making problems faced by customers who are offered two mutually exclusive supermarket discount formats: an unconditional per-selected-item discount and a conditional per-purchase discount applicable only when the total purchase amount reaches a specified spending threshold. The analysis provides a normative benchmark for comparing these formats from the customer's perspective and determines what a customer should do, once they have selected their cart, to minimise total payment. When the threshold is reached, the problem reduces to a monetary comparison between applying a higher discount to a most expensive item in the cart and applying a lower discount to the overall purchase. When the threshold is not reached, the problem becomes more complex, as the analysis requires determining whether applying a higher discount to a most expensive item in the original cart results in a lower or higher total payment than adding an additional item to reach the threshold and applying a lower discount to the new total purchase amount. To automate the required calculations and thereby facilitate discount comparisons, we provide a prototype decision aid in the form of R functions, which could serve as a basis for supermarket decision-support tools. Članek obravnava dva resnična problema odločanja, s katerima se soočajo kupci, ko jim trgovci ponujajo dva medsebojno izključujoča se formata popustov v supermarketih: brezpogojni popust na izbrane posamezne izdelke in pogojni popust na celoten nakup, ki velja le, če skupna vrednost nakupa doseže določen prag porabe. Analiza ponuja normativno merilo za primerjavo teh dveh formatov z vidika kupca ter določa, kako naj kupec po izbiri izdelkov v nakupovalni košarici ravna, da minimizira skupni znesek plačila. Ko je prag porabe dosežen, se problem zmanjša na denarno primerjavo med uporabo višjega popusta na najdražji izdelek v košarici in uporabo nižjega popusta na celoten nakup. Če prag ni dosežen, postane problem zahtevnejši, saj je treba ugotoviti, ali uporaba višjega popusta na najdražji izdelek v prvotni košarici privede do nižjega ali višjega skupnega plačila kot dodajanje dodatnega izdelka za dosego praga in uporaba nižjega popusta na novo skupno vrednost nakupa. Za avtomatizacijo potrebnih izračunov in lažjo primerjavo popustov avtorji predstavljajo prototipno odločitveno orodje v obliki funkcij v programskem jeziku R, ki bi lahko služile kot osnova za razvoj sistemov za podporo odločanju v supermarketih. customer behaviour decision theory normative benchmark per-purchase discount per-selected-item discount vedenje potrošnikov teorija odločanja normativni okvir popust na celoten nakup popust na izbrani artikel true false true Angleški jezik Slovenski jezik Članek v reviji 2026-08-14 09:59:58 2026-08-14 09:59:58 2026-08-15 03:06:55 0000-00-00 00:00:00 2026 0 0 str. 1-12 article 103435 Vol. 14 Dec. 2026 0000-00-00 Zaloznikova NiDoloceno apc 0000-00-00 0000-00-00 2026-08-12 519.816 2590-2911 10.1016/j.ssaho.2026.103435 287789059 RAZ_Velkavrh_Ziga_2026.pdf RAZ_Velkavrh_Ziga_2026.pdf 1 184B935186977892DA06013635D2496D c128f07598b4bc68b1eeb0733bfdccb9b9c862ddaa9e9c49916587675c3f8b72 0aaac0af-97b6-11f1-9e8d-005056ac49c0 https://repozitorij.upr.si/Dokument.php?lang=slv&id=34427 https://www.sciencedirect.com/science/article/pii/S2590291126010016 1 eab451d7-97b5-11f1-9e8d-005056ac49c0 https://repozitorij.upr.si/Dokument.php?lang=slv&id=34426 Fakulteta za matematiko, naravoslovje in informacijske tehnologije 0 0 0