# Activities
Activities helps you plan your projects more accurately, while giving valuable insight into hours planned and spent.
When working with several activities, you can connect hours directly to the activity, which again can be specified in your invoice.
Go to [**Projects** ](https://app.moment.team/projects)> ***name*** > **Activities** and click **+ Add activity**.
As you can see in the picture, the activities overview shows the title, duration, estimated, used hours and hours invoiced of the activities. Activities, in order to be invoiced, need to have a price model defined.
Activities overview
After clicking on **+ add activity** a creation window will open, in that window you fill in all of the information you see suitable for the desired activity.
You are able to configure the activity after you've created it, this can be done by pressing the pen symbol as showcased in the picture below. When you click on the pen (edit), a similar window to the task creation window will appear.
### Activities settings
{% tabs %}
{% tab title="Title" %}
Here you can choose a title for the activity.
{% endtab %}
{% tab title="Activity number" %}
Here you can define a number for an activity.
{% endtab %}
{% tab title="From/Until date" %}
From date/until date define the duration of the activity. You may choose not to define any dates here.
{% endtab %}
{% tab title="Status" %}
Here you can define the status for the activity. Depending on the progress, you might add different statuses. Only activities with status *In progress* can be added hours to. However, you can create activities with status *Not started* if you want to set up the project completely before allowing hours to be added.
{% endtab %}
{% tab title="Estimated hours" %}
**Estimated hours** is for planning purposes. Co-workers can be warned if adding more than the estimated hours, and likewise the project owners can receive an alert. To enable this option and make it visible, go to [**Setup** > **Settings** > **Projects**](https://app.moment.team/settings/preferences/projects). Scroll down to **Activities** and enable **Use time estimates on projects**.
{% endtab %}
{% tab title="Hours alert" %}
Like the text says in the settings box, alerts can be defined when a certain amount of hours have been registered. Once the hours specified are reached/passed the project owner will be notified.
{% endtab %}
{% tab title="Probability" %}
Probability when it comes to activities is how likely it is to complete the certain activity.
{% endtab %}
{% tab title="Price model" %}
Here you can choose a price model for the specific activity. You can choose between fixed price and hour based price models. Different price models allow for invoicing to different customers, splitting of invoices and other functions such as subscriptions.
{% endtab %}
{% tab title="Share of total price" %}
This is used to clarify how much of the total fixed price a specified activity should account for.
{% endtab %}
{% tab title="Invoiced separately" %}
If **Invoiced separately** is activated the hours and expenses related to the activity will be invoiced separately.
{% endtab %}
{% tab title="Description" %}
Here you can add a description for the activity if you wish.
{% endtab %}
{% endtabs %}
### Price models and activities
In order to invoice activities in Moment, they need to be have a price model defined. However, one must be aware of the interaction between price models and activities. For instance, you can invoice separately both activities and price models, but these are mutually exclusive, meaning you can only choose to either invoice an activity separately or a price model separately, but not both, if they are linked together.
As you can see from the picture below, invoices containing activities that have "invoiced separately" active will appear with a green and black paper icon next to it.
The conclusion that can be drawn from this is that it could be a good idea to have activities marked for the option to be invoiced separately. At least for reporting purposes.
Activities can also be invoiced to separate customers. For instance, if a certain project involves the rental of equipment, or renting of rooms, you can set up one activity for every customer. This way, these activities and customers within a project can share a common price plan, but be invoiced separately.
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