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The option to run Completed Builds by Item Summary report is unavailable in QuickBooks Desktop. However, we can run a custom report that will display the items used in Build Assemblies. Here's how: 

1. Go to the Reports menu.
2. Select Custom Reports.
3. Choose Summary.
4. From the Display tab, set the date range to the period you need.
5. Click the Customize Report button.
6. On the Display rows by drop-down, select Item detail.
7. Under Display columns for, select Quantity (select Amount if the dollar amount is required).
8. On the Filters tab, remove the Account filter.
   • Add Transaction Type then select Build Assembly filter.
   • Add Detail Level then select All except summary filter.
9. Click the Ok button.

Once completed, you can review the report details and click the Memorize button to save the report for future use. You can read through these articles for more detailed steps: Customize item reports. QuickBooks offers a wide variety of reports that tell where the company stands. These reports offer critical information about the company. Please read this article for your reference: Available Reports in QuickBooks Desktop.

 If this is something our engineers need to look into, you can submit product suggestions by following these steps:

1. Go to Help at the top menu bar.
2. Choose Send Feedback Online.
3. Select Product Suggestion.
4. Enter your product request/product suggestion.
5. Click Send Feedback tab.

I'm just one post away if you need a hand with exporting your reports or any QuickBooks related. I'll be here to ensure your success. You have a good one.