This action requires the **"can reserve"** permission
On work order's page in ERP, open the "**Bill of materials"** section of work order's items. If the bill of materials is empty, we need to add some material first.
In the "Product" select form, we find the material we want to add/reserve on this work order item and enter the quantity of material to add to the work order.  We then click the **"Select serials"** button, which opens a popup, depending on if the work order item is tracked by serials or not. If **work order product** is **tracked** by **serials,** check the listed serials, you want to add this material to.
Click the **"Add product"** button. This adds the material to the work order item's bill of materials. The material's background is then colored yellow if it is on stock or red, if it is not. **Products in the bill of materials are color-coded**, depending on their current reservation state:**Not-yet-reserved material that has no stock** is red.
**Not-yet-reserved material on stock** is yellow.
**Virtually reserved material** is blue.
**Physically reserved material** is green.
Before physical reservation, the **added material needs to be virtually reserved.** This "marks" some of the material on stock for this work order before the actual material reservation. We can reserve one material at a time with the "thumbs up" button, or multiple by selecting their checkboxes and clicking the **"Reserve"** button.   Once the **material is on-stock and virtually reserved**, we can **physically reserve** it. To do this, we press the "**Create** **reservation** **task"** button on top right corner. This open a popup, where we select our user, set current date and then press the **Create** button.For the task, other users can be selected, but then the task will be assigned to them. Likewise, a later date can be selected, but the task will not appear until the set date.
 When the reservation task is created, navigate to the dashboard and start/open the reservation task, found under **"My tasks"**.  Once the task is competed, the material is physically reserved on the work order.