Numbering policy and procedure documents can be easy or hard depending on how you finally decide on the numbering format. I use simple numbering as you'll see below but there are reasons for having a more complicated numbering system. I will give you both options and you can decide.
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Option 1: Simple system. First of all, I like to do a four or five digit numbering system for all policies and procedures. In other words, I don't use a separate numbers for policies and then another for procedures. Also, I like to use a sequential numbering starting from a large number like 1000 or 10000. For example, if I have a Human Resources policy on relocation, a second procedure on Purchase Requisitions, and a third policy on Forms Management, then the numbering system, based on a four-digits, would be:
Option 2: Some policies and procedures writers use a more complex system to try and pinpoint specific areas within departments. For example, a company might use a format such as:
MF-RC-PE-1001 to stand for the first procedure in the Receiving Department within the Manufacturing Department. A policy might have the number MF-RC-PL-1002 where PL stands for policy. You get the picture.
I have to admit that I did use this numbering format early in my career but it's so hard to maintain. And forget ever maintaining it when the departments change their name. For example, when Office Services becomes Administrative Services or when Engineering becomes Research and Development or when Office of the President becomes Corporate Offices. When this happens, your entire numbering system would have to change.
Summary: I prefer the four or five number numbering system due to its simplicity. I find the second option as cumbersome but yet some companies might find good reason to use it. The system you select is your choice but all I recommend is that you do some research as to how it will hold up over time in your company environment.
All possible plastic film defects ought to be detected and eliminated by the extruder operator before the roll gets shipped to the customer. But in practice, through oversight and inattention to detail defects can slip by that may be all too easily spotted by the customer or the customer's customer. I have found a variety of unrelated faults that fit into this category.
First is the appearance and a good looking finished plastic roll of film this aspect can be half of the battle. Keep in mind is that first impression what you see is what you get! A superficially ugly looking roll which may convert on the filling machine or bag machine can have the operator looking at the roll much closer for the entire lot for real or imaginary defects.
A roll that has 롤육성 a machine cylinder look means no scuff marks, damaged edges, and fuzzy ends, protruding or buried core ends, or crushed cores. The solutions to these problems are self evident. There are other finer detailed defects that can be buried in the roll, and may be if the production line is never approached by the operator except during a roll change. There is no excuse for the customer being the first to see these.
I have a couple of areas for helping prevent roll defects:
How to Tackle Blocking of the Plastic Film - a common reason for blocking is too much winding tension. This maybe over looked unless tension is so great as to crush the core as the film is being wound on the roll. This makes it impossible for the operator to remove the roll from the winder shaft. With a case of crushed cores, the rolls may be hard to get off of the shaft, only to have the customer find them impossible to remount on a un-wind stand.
Just as bad of a problem can arise if the winding tension is too light, no blocking but the film may telescope from one end of the roll, making it impossible to convert into finished product.
Hot weather can bring its share of blocking problems. Plastic Film is insufficiently cooled and the inner surface blocks as they pass through the nip rolls. For a cure you must reduce the output, raise the tower height or nip rolls, or use refrigerated air or other means of improving cooling efficiency. It also can be an inefficient air ring.
An entirely different cause of blocking can be using a resin to produce 1 mil film that has a slip and anti-block additive level designed for heavier gauges like 4 mil. There just isn't enough additive to do the proper job. Over-treatment and or high gloss can aggravate if not cause blocking with any of the above conditions.
Tendency to Split - Plastic Film with splits tendencies can also be overlooked unless samples are taken to examine, or actually tested. Insufficient cooling, a high frost line or to low of a blow up ratio, separately or a combination can accentuate the machine direction or orientation of the film causing the film to become splits. Also your nips in the tower maybe to tight particularly with an old and hardening nip roll which can deform the plastic film in the edge crease and make it splits. Die lines or another name is weld lines from the extrusion die make splits film as can scratches from the collapsing frame in the extrusion tower or a bur that has developed if using wooden collapsing frames. But not so readily detected are the fine weld lines caused by degraded particles of resin or dirt lodged under or in the die lips that make the film extremely split at the weld.
Good operator observations to equipment maintenance, quality testing of roll samples and putting the proper procedures in place will help in building customer loyalty.