ATT is a small retailer that specializes in selling 'seasonal goods' which change throughout the...

ATT is a small retailer that specializes in selling 'seasonal goods' which change throughout the year. Some products need regular reordering and some only require a start-of-season single order. Sales volumes are unpredictable and variable. Ordering is from multiple suppliers with variable lead times (between two weeks and two months). ATT has no computerized stock management system but can monitor product sales through the barcode-equipped point-of-sale (POS) system.

Which of the following would be appropriate to support ATT for its stock monitoring and reorder requirements?