| 97Self-adhesive materials RAW MATERIAL INVENTORYWhat is the value of the material warehouse?Historical stock valueAverage line 0.57m0.6mJun Jul Aug Sep OctN ov Dec Jan FebM ar Apr0.4m0.2m0.0mMaterial inventory value over the year“Every complaint about an individual roll, whether before or after production, can be traced in the supplier’s production database by sending them the roll ID”Estimating and reporting The ultimate key to reducing inventory is precise estimating of substrate quantities needed for production. This will start by breaking down current waste totals in the fnest possible detail. According to fgures compiled by MIS specialist Cerm, in the most extreme cases only half the total material ordered by the converter ends up actually going to the customer as fnished labels. Waste estimation techniques include setting up an average waste per roll and multiplying the number of roll changes required for a given production length. This can be determined by checking Roll re-identifcation labelhow many meters are thrown away at the end of every roll; how many meters are not used at the beginning of every roll; and how many meters are lost when switching rolls. You can even use two bins to collect this data, one at both ends of the press. Detailed waste reduction instructions, based on these estimates, should be followed by the press operators. A good shop foor reporting system can help determine the biggest components of your waste. If you measure the length entering every individual machine for one job, you will know how many meters are lost during the different production steps like printing or fnishing. The same reporting system can give you much more useful information. You will be able to set up an OTIF (on time in full) delivery rating for your material suppliers. You will know exactly the total sqm purchased per type of substrate for your annual price negotiations. To read more or to buy the book, visit www.labelsandlabeling.com/label-academyA non-stop unwinding systemJan - Mar 2023