The unit groups are useful to create measures. That helps the system to know how every unit should be managed and computed. The Raw Material modules add Units and Units groups. We’re about to learn what are the differences between both and how you can use them.

## What Is The Difference Between Unit And Unit Groups ?

The unit is essentially the measure and his value. It can be a known measure (liters, kg, piece) or customized measure. By customized measure we mean that you can completely create a new measure and as long as it’s coherent, that works perfectly.

The Unit Group in order hand is considered as a category for the Unit. That groups similar units together. For instance, you’ll usually have weight units such as “kg”, “g” within a “Weight” unit group. It doesn’t make any sense to have liters and kilograms within the same unit group.

## How To Create Unit Groups

The first step is to create a unit group. You should start by creating the list of groups you’ll set on the system. As you might also want to create a customized measure, you should also define that on a draft.

**Known Measure**

**Group :**Weight**Units**:- Kilogram
- Gram
- Milligram

**Customized Measure**

**Group**: Votka Shot**Units :**- 1 shot
- 1/3 bottle
- half bottle
- 2/3 bottle
- Bottle

As you can see, you don’t have any restrictions on how to define the groups. However everything should remain coherent. And we’ll see why later. So let’s create a unit group. Let’s head to “**Raw Material**” then “**Units Groups**“.

This takes you to the list of group available on the system. Since we don’t have one, we’ll create a unit group. For this demo, we’ll create a unit for managing chicken slices.

Once you’re done, save your settings.

## How To Create Units

Units as we said earlier are measure and their value. They can be known or customized. To create a measure, head to “**Raw Material**“, then “**Units Entities**“.

Since we don’t have any entity, let’s click on “**Add Material Units**“. This takes you to a new UI where you can create the unit itself. However here is what you should consider regarding the value and the “**base unit**” field.

The value is the measure you would like to give to your measure. In case of a known measure, that value can be for example 1 (for milliliter) or 1000 (for liter). Note that, the value might be set according to what you consider as the base unit. The base unit is the pivot measure, it’s used to compute other greater units.

For example, we assume for liters our base unit is “**milliliter**“, we’ll then create as a base unit “**Mililiter**“, set a value of 1 and save it as “**base unit**” (save as base unit “**yes**“). Now, we want to create a liter unit. That unit uses “**milliliter**” as a pivot, so the value of the liter will be “x” times the milliliter, where “x” is the value you want to gives to the unit (measure). In our example, the liter will be **1000** as liter is 1000 times the milliliter.

Let’s go back to our example (chicken). Remember, the unit groups help to handle chicken slices. For our case, the chicken can at most has 4 slices. That means 1/4 is the smallest unit entity and therefore it should be the base unit.

Note that here, we have set the unit value to 1 and the base unit to “Yes”. You should also make sure to assign the unit to the desired unit group.

**Important**: The default unit should always be the smallest unit within a group. Doing the opposite will lead to miscalculation.

## Creating Other Units

As we have defined the base unit, we can now create the other units. For the chicken slices, we can have as unit :

- 1/2 Half Chicken which is 2 times the 1/4 quart (here 2 is therefore the unit value, and this shouldn’t be the base unit).
- Entire Chicken which is 4 times the 1/4 quart (here 4 is therefore the unit value…).

Once you’re done, you should have the following set of units.

## Final Words

Now that you have created some Units, you might need to know how to create Materials.

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