In your BigCommerce account, ensure that your products and orders are up to date.
It helps if your inventory is tracked with current stock levels set, and pricing data up to date.

In BigCommerce, find settings in the navigation on the left hand side, then select Store-level API accounts

Then, select 'Create API account'

Then, for name enter 'StockTrim' and make a record of 'API path'

Make the following selection for OAuth Scopes, then click Save

Make a record of the Access Token

Enter API Path and Access token into StockTrim. Then Click 'Load from BigCommerce'.

On the dashboard you will see how many products you are overstocked or understocked with, as well as the related costs. Click, 'See my plan' to see the optimal reorder points and suggested order quantities to save you these costs.

On each product, you can select the 'i' icon to bring up the demand analysis. See your trends, and see how the forecasts are calculated so you can oversee the results to have confidence they're correct.

Click the settings wheel to set the lead time and service level. Make sure that the lead time is set so that you have enough stock to cover the time between when you place the orders with your suppliers and when they arrive.