accruals formula

With regards to the accruals formula,

accrualsCF = NI − CFO − CFI

Why is it that CFF is not apart of this formula? The way I think about the formula is as follows:

  • makes sense that if NI is super high and CFO is super low or negative, that accruals would be really high (logic)
  • why exactly would negative CFI over the year increase accruals?
  • and why is CFF not a factor here?

Thanks!