# Sequential/Parallel

**Sequential** and **Parallel** appointments allow users to schedule multiple treatments either in a sequential manner or in parallel. As mentioned in [Custom Duration](/uniteemr/application-modules/scheduler/appointment-booking/auto-calculation-of-appointment-duration.md) appointments, the duration of these treatments can be predefined in the [**Service Master**](/uniteemr/master-modules/items/service-master.md) screen. This preset duration is automatically filled when creating an appointment, and the appointments can be split either Sequentially or Parallelly.

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### Steps for Creating Sequential and Parallel Appointments

* Open the **Scheduler** **(Home > Front Desk > Scheduler)** screen and double-click on the available time slot for the required doctor. This opens the Appointment Pop-up screen.
* In the **Treatment Information** section, when selecting multiple treatments, an additional dropdown menu appears where users can choose between **Single Appointment** or **Multiple Appointment**.

  <figure><img src="/files/oJAuUDU5HddhKOd5cL3z" alt=""><figcaption></figcaption></figure>
* Select **Multiple Appointment**.
* Upon selecting **Multiple Appointment** radio buttons for **Sequential** and **Parallel** appointments will be displayed.

#### **Sequential Appointment**

* In a **Sequential** appointment, each treatment is scheduled one after the other, creating a separate appointment for each treatment.
  * When the **Sequential** radio button is selected, the appointment is split so that each treatment gets its slot, scheduled one after the other.
  * The duration of each treatment is based on the predefined time set in the **Service Master** screen.

    <figure><img src="/files/5Fpzrwyk9Vr6Pzz55TcH" alt=""><figcaption></figcaption></figure>

#### **Parallel Appointment**

* In a **Parallel** appointment, treatments are scheduled concurrently.
  * When the **Parallel** radio button is selected, the treatments are scheduled in parallel, splitting the appointment for each treatment into concurrent time slots.
  * The duration of each treatment is based on the predefined time set in the **Service Master** screen.

    <figure><img src="/files/XKMF8qIh1bAGIjEK2oIw" alt=""><figcaption></figcaption></figure>

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