---
title: Quantity Limits
slug: quantity-limits
createdAt: 2025-09-16T15:11:38.296Z
---

# What It Means

By setting up the maximum quantity in quantity limits, you can decide the **highest number of units **your machine or workstation can handle at the same time. 

*For example: “This furnace can only process 100 parts in one batch.”*

Once you’ve set that limit, planeus will make sure your plan never overloads the resource.

# How it Works in Resources 

![](https://app.archbee.com/api/optimize/M1QBpK9lJudQQL_d-GMK2/ybYwTMpmV-hVJ_QR1M9rM_image.png)

When the **“Limit Quantity”** option is enabled: 

- In the **Resource settings**, you enter the maximum quantity the Resource can handle at once.
- From then on, the system will always keep this in mind when scheduling orders. You can simply type the number. Units of measurement are irrelevant here.

:::hint{type="warning"}
The following rules apply to a Resource with a Quantity Limit:

- It will become a **Multi-Assignable Resource**, allow processing multiple tasks at once, up to the maximum quantity you set.
- It **cannot **be an [Attendant Resource](docId\:Pwn_ellFhl-1hHiN7efbn).
- It **cannot** be a [Parallel Resource](docId:5E4pJD__vvYxLpkIc3oha) or [Installer](docId\:U20v5CaIQG_-_lVSeiXCH) Resource.
:::

# How it Works in Technology 

In the current version of planeus, if you assign a Resource with a Quantity Limit to a Work Step:

- You must enter a **setup time **(the time needed to prepare the Resource before work can start).
- Under Resources with Quantity Limits, instead of the Duration/Unit time, the **Setup Time will be determining the actual length of the Work Step** in the Resource.

# Planning Rules

When planeus schedules with maximum quantities, it follows these rules:

1. **Order items stay undivided**
   The system won’t split a single order item into smaller parts.
2. **If the order fits**, the whole item goes on the resource.
3. **If the order is too big**, planeus will fill the Quantity on the resource up to the max. The leftover quantity is then scheduled as a follow-up task on the same resource.
4. **If the Resource have some free space left,** a new order that fits into that space will be scheduled there. 
5. **No overlapping allowed. **When you add new Work Steps to a Resource, planeus always respects the start and end times of the Work Steps already scheduled. This means you cannot place Work Steps in a staggered or overlapping way on the same machine. 

## Manual Changes

If you need to stagger or move Work Steps anyway, you can do this with **free move**.

- To prevent mistakes, it’s best to keep [Fix Production Orders](docId\:MCScW6CEMmikvG-WSpxzV) enabled.
- If you need to move a specific Work Step, you can [unlock it](docId:7lS4fF8Z5_1Z5-8EGi-Tl) on the Gantt chart.

## Example 1: Machine Capacity

- Oven A has a max quantity of **100 pieces.**
- You want to run four orders:
  - Order 1: 20 pieces
  - Order 2: 30 pieces
  - Order 3: 30 pieces
  - Order 4: 40 pieces

Together, that’s **120 pieces** — too much for Oven A at once.

**What planeus does:**

![](https://app.archbee.com/api/optimize/M1QBpK9lJudQQL_d-GMK2/2z-DElePqfiYCmnB-pB69_image.png)

- Schedules Orders 1 + 2 + 3 = 80 pieces in parallel.
- Leaves 20 pieces free.
- Puts Order 4 = 40 pieces *right after.*
- So the oven **never goes over 100 pieces**.

## Example 2: Using Remaining Capacity 

- In the case above: Machine A still has space for 20 pieces.
- Now a new order comes in: 20 pieces.
- **planeus fills the 20-piece gap** with the new order — no wasted space.

:::hint{type="success"}
With **Quantity Limits**, planeus **automatically fills leftover capacity**, **avoids overloads**, and keeps machines at the right load. Manual changes are possible, but you stay in control by fixing or unlocking orders as needed. 
:::