“…Ouyang et al (2006) considered EOQ model for items with delay in deterioration, permissible delay in payments and where the demand before and after deterioration starts-in are the same and constant. Monika and Shon (2010), Baraya and Sani (2011), Musa and Sani (2012), Dari and Sani (2013), Dari and Sani (2015), , Palanivel and Gowri (2018) and likewise worked on inventory model with delayed deterioration. This paper presents an EPQ model for items with delay in deterioration, reliability consideration, quadratic demand and shortages are allowed but partially backorder.…”