1. The purpose and significance of Marking:
Marking is the equivalent of the BOM in some factories, it differs from the Bill of Materials in that the Bill of Materials is only the result, whereas Marking also includes the process of calculation. It is the most economical way of listing the amount/cutting of all the materials required for the production of the bag and the location of the materials on the bag.
2. The purpose of the Marker Count:
A. To provide unit quantities for calculating the cost of materials for the bag;
B. To provide a basis for purchasing materials;
C. To provide a standard quantity for the warehouse to issue material / production unit to receive material;
D. To provide cutting standards for material preparation personnel;
E. To provide a reference basis for the quality assurance department and production units.
3. The basis of Mark's material counting:
A. Delivery list: The delivery list includes the sample list/contact list/amendment list and some modifications from customers, etc;
B. Samples: Samples include customer samples / original samples / samples left behind, etc;
C. Type plate (and paper grid);
D. In addition to the above three bases, in the absence of samples and paper frames, sometimes the material is estimated on the basis of drawings, so that drawings sometimes become an important basis for calculating material instead of samples and paper frames.
4. Units of Marking:
The units commonly used for Marking are yards (Y) and inches ("), as well as CM/M/KG.
5. Workflow of Marking:
Marking of bulk goods (single batch quantity/standard quantity) Marking of samples (unit quantity)
6. Composition of the marker:
Headers and columns
The headers include: Finished goods code / Delivery number / Product name / Order quantity / SIZE / Sample quantity / Colour number / Production quantity etc.
Part Number/Name Specification Unit Plate Number Specification
Horizontal*Straight Single group
Demand Number of touches per bed
Cross*Straight Total number of touches
denominator numerator remainder ratio allowance rate standard quantity
II. Calculation of the main material in Mark's calculation:
In the
Handbag industry there are various methods of calculating the main material, such as the area method/layout method and the Marker layout method, each of which has its own advantages and disadvantages. The Mark layout is divided into two cases, one is the regular cutting piece layout, one for the irregular cutting piece layout.
1. Regular cut-piece typesetting:
Regular cut-piece typesetting is usually done by measuring the size of the original pattern or cut-piece and adding 1/8" or 1/4" of loss on top of that, depending on the specific situation (e.g. 1/4" for materials with strong shrinkage and 1/8" for the opposite). This dimension is the specification (horizontal*straight) in Mark's calculation of the material. The numerator/denominator is then calculated based on the width of the material and the assumed length, which is used to calculate the standard or unit dosage, which is calculated as follows:
Number of pieces = width (length) of material / width (length) of cut pieces (Note: take the whole number)
Material width (length) = cutting width (length) * number of pieces (Note: the remaining number should be added to the whole number and then add 1")
The first of these formulas is used to find out how many cut pieces can be arranged in the direction of knowing the width (length) of the material.
The second formula is used to assume that the row of X pieces of cut pieces after the width of the material (length) degree.
2. Calculation of irregular cut pieces:
In order to achieve the most economical results for irregular cut pieces, an effective action is required - nesting, also known as marker nesting, i.e. arranging the pattern in the most economical way according to certain rules. The maximum/minimum value is obtained from the nesting, i.e. the specification (horizontal*straight) in the material count, and then the numerator/denominator is calculated according to the material width and the assumed length in combination with the following formula.
Number of pieces = [width (length) - maximum value] / minimum value * 2 + 2
Length (width) = (number of pieces - 2)/2*min + max
The first of these formulas is used to find the number of cut pieces that can be arranged in the direction of the width (length) of the material.
The second formula is used to find the width (length) of the material after assuming that X pieces have been cut.
III. Measurement of the substrate:
1. For sub-materials that need to be cut with a knife, such as curved Velcro, a certain direction must be noted and a 1/4" loss added.
2. For webbing/buckle/elastic/PP rope/elastic rope which must be processed first and then sent to the production unit, the actual length of the material is usually measured and calculated, especially for webbing used as reinforcement, which requires 100% accuracy (type version).
3. The edge band (including webbing for the edge, the main material edge cutting) / P-tube / elastic band edge and other running hundred yards of loss of materials, measurement should be in the type plate or sample of the actual length of the measurement after the addition of 1 ~ 2 "wide put, depending on the circumstances.
4. The length of the zip is the actual length of the zip, such as longer zips can be considered to add 1/8"~1/4" of width. The length of a strip zip is the actual length of the zip between the two stops without any allowance. In the process of zip counting, it must be noted that zip sliders must be matched and never mixed.
5. The material of the fastener should be noted as the material/specification.
6. Four-way buckle/press button/cockhole buckle/bumping nail/hollow nail/screw and nut etc. should be used together.
7. Special sub-materials should be measured, e.g. the elastic band around the side of the mobile phone bag will shrink after processing, so 1/8~1/4" loss should be left. Herringbone nylon belt in the process of wrapping, because of the shrinkage of larger sometimes up to 5 ~ 8" loss, depending on the specific situation.
IV. Allowable loss rate.
1. In the case of large goods, there is a column "Allowable loss rate" in Mark's material count. This rate of loss refers to the loss of printing/embroidery/hot pressing/trimming etc. There is a standardized rate for this loss, which is determined by the number of orders placed and the percentage of loss given.
2. For materials such as clasps/buttons/cockhole clasps/staples/hollow nails/screws/nuts, which are subject to large losses during processing, a corresponding loss allowance should be given according to the number of orders.
V. The problems that need to be paid attention to when layout counting:
1. In the process of counting the main and secondary materials, if expressed in words, the colour/texture/specification should be clearly indicated and the full name should be used to distinguish between similar materials to avoid confusion and mistakes.
2. When making special sections of materials (such as bevelling/trimming/gluing/voltage, etc.) must be specified, and the loss should be given to the loss.
3. Some special materials must pay attention to the direction of the layout, such as velvet/mesh, etc. Even if you do not save material, you can only layout in one direction.
4. The width of the material (main material) cannot be 100%, it needs to leave some space.
5. For a bag to be counted, both the main and secondary materials must be measured in a certain order, from front to back/top to bottom/outside to inside/left to right, so that no material will be missed or under-counted, so that the accuracy of the count is close to 100%.
VI. The rights, responsibilities and duties of the counting staff:
1. The material counters should do their job, calculate the cost of the bags in a timely and accurate manner, and complete the quotation.
2. It is the responsibility to review the aesthetics/functionality/stitching of the bag, to control the cost of the bag, to disagree with the pattern maker's practice, and to propose improvements to the stitching of the turner.
