How to create bills of materials¶

A bill of materials (also known as BoM or BOM) is an extensive list of raw materials, components, and instructions required to construct, manufacture, or repair a product.

Requirements

This tutorial requires the installation of the following applications/modules:

Manufacturing

In Viindoo, to create a new BoM, navigate to Manufacturing > Products > Bills of Materials and then press on the New button.

Then you need to add the following information:

General information¶

Product: a finished or semi finished-product that will be manufactured;
Quantity: define the product quantity that will be manufactured based on this BoM;
Reference: the sales/purchase order reference code for this BoM;
BoM Type:
- Manufacture this product: enable if the BoM is applied to produce this particular product.
- Kit: allow managing incoming/outgoing bills of materials as a kit containing various products. For example: when you purchase a desktop PC, you can create a BoM kit including components such as a mouse, keyboard, monitor, CPU, etc. instead of having to process the receipt order of each part of this PC unit. This BoM type does not apply to manufacturing operations.
- Subcontracting: select this option if the BoM is applied to outsourcing products. To see this option, you need to activate the subcontracting feature.

Components Tab¶

Click on Add a line to define components and materials of this bill of materials.

Component: include raw materials, and accessories participated in the manufacturing process;
Quantity: define the number of materials that will be consumed during the production;
Product Unit of Measure: the corresponding unit of measure of each component;
Consumed in Operation: select the operation in which this component will be consumed.

Operations Tab¶

The Operations tab is displayed only when the Work Orders feature is activated.

Press Add a line to add different operations to produce this BoM.

Operation: a production step to manufacture a product from the BoM;
Work Center: represent all the resources that will participate in the manufacturing process, to transform raw materials into a finished product;
Duration: the required time to perform an operation.
Duration Computation: how the duration of this operation is computed. It can be either Compute based on tracked time or Set duration manually. This information is defined on each operation configuration.

By-products Tab¶

Note

You need to activate the By-products feature on Manufacturing app to see this tab. Navigate to Manufacturing > Configuration > Settings to activate said feature.

By-product: add the secondary product derived from the production process of this BoM;
Quantity: the number of by-products that will be produced;
Unit of Measure: the unit of measure of this by-product;
Produced in Operation: the operation where this by-product is derived from.
Cost Share (%): define how many percent of the production cost of the total amount of by-products contribute to the total production cost of the final product (including all costs incurred during the production of this product). The total of all by-products’ cost share must be less than or equal to 100.

Miscellaneous Tab¶

Manufacturing Readiness: define when the manufacturing order will be ready to process.
- When all components are available;
- When components for 1st operation are available.
Flexible Consumption: allows flexible consumption of materials.
- Allowed: allows materials consumption more or less than the configured BoM;
- Allowed with warning: displays a warning to users when the materials consumption is different from the configured BoM but still allows the operations;
- Blocked: displays a warning when the materials consumption is different from the configured BoM. However, only the administrator of the Manufacturing app can confirm this consumption at the end of the manufacturing order.
Manuf. Lead Time: average lead time in days to manufacture this product. In the case of multi-level BOM, the manufacturing lead times of the components will be added. In case the product is subcontracted, this can be used to determine the date at which components should be sent to the subcontractor.

Example: A product’s scheduled shipment date on the SO is September 25th. The product requires 20 days to manufacture. So, the latest date to start the MO to meet the commitment date is September 5st.
Day to prepare Manufacturing Order: compute the days required to resupply all components from BoM, by either buying or manufacturing the components and/or subassemblies. Also note that purchase security lead times will be added when appropriate.

Example: A BoM has two components: A and B, the A has a manufacturing lead time of 3 days, and the B has a purchase lead time of 5 days. Purchase security lead time is 2 days. The Days to prepare Manufacturing Order calculates the longest lead time among all the components listed on the BoM is 7 days (add security lead times).