The purpose of mapping your POS Items is to create a definitive link between the dishes/drinks you sell and WISK inventory products.
When you sell a drink or dish, WISK knows the cost and how much of each ingredient is used based on the mapping.
This is essential for identifying variances. Your variance compares a product's consumption to a product's sales.
In other words, it compares how much you actually used to how much you theoretically used based on your recipes and the number of items sold.
Consumption is the difference in stock counts from one inventory to the next while taking invoices, returns, and depletions into consideration. It doesn't consider sales at all.
In other words, it's how much you used of an item in an inventory period. If measured in $, this is known as the cost of goods sold.
For products that find themselves in multiple POS Items—lets say a liquor sold by the shot, single, full unit, or in several cocktails—it's necessary to have POS Item Mapping in place to link each POS Item's PLU with the associated WISK product.
Let's take the following Belvedere sales for example:
Belvedere Shot (1 oz) x 10 = 10oz
Belvedere Single (1.5 oz) x 5 = 7.5oz
Vodka Cocktail A (2 oz) x 6 = 12oz
Vodka Cocktail B (0.5 oz) x 2 = 1oz
If all these items contain Belvedere, then properly mapping these POS Items will tell us that you sold a total of 30.5 oz of this product. We can then compare this value to the actual consumption to see if there had been any overpouring or theft.
If any items are not properly mapped, we would be comparing the consumption to wrong sales total and so that variance would not be reliable.