Budget Variances and Accruals

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In a typical company budget variance review, my department has erratic expenses. Which means 2 months we have nearly no expense and on other months I have expenses in the 6digits. This is primarily because suppliers do not send their invoices in the timely manner.

If I have a fixed accrued amount that averages the overall invoices, will that answer my budget variance? Or is budget variance and accruals 2 separate things separately discussed?

Thanks!