```ruby
ActiveAdmin.register DeliveryUpdate do
  permit_params :study_id, :data_analysis_status_id,
                :data_collection_status_id,
                :interpretation_and_write_up_status_id, :user_id, :comments

  menu parent: "Delivery updates"

  filter :study
  filter :user
  filter :created
end
```

Improve the columns show on delivery update admin
user
```ruby
ActiveAdmin.register DeliveryUpdate do
  permit_params :study_id, :data_analysis_status_id,
                :data_collection_status_id,
                :interpretation_and_write_up_status_id, :user_id, :comments

  menu parent: "Delivery updates"

  filter :study
  filter :user
  filter :created

  index do
    selectable_column
    column :study
    column :user
    column :data_collection_status
    column :data_analysis_status
    column :interpretation_and_write_up_status
    column :created_at
    actions
  end
end
```
assistant