Final answer:
The cash payback technique is disadvantageous because it doesn't consider cash flows beyond the payback period.
Step-by-step explanation:
The disadvantage of the cash payback technique is that it ignores cash flows beyond the payback period. This means that it does not consider the long-term profitability of a project. For example, if a project has a payback period of 3 years but generates significant cash flows in the following years, the cash payback technique would not take those future cash flows into account.