This is also something you can kind of simulate through software, right? I haven't used it myself, but it seems along the lines of what software like YNAB is -

This is also something you can kind of simulate through software, right? I haven't used it myself, but it seems along the lines of what software like YNAB is - setting future targets for budget categories, and then funding them as chunks of money come in, such that for any particular day per time period, you can see if you are ahead of or behind schedule. Zooming out, there's a lot of tech theory on buffers and streams that apply. A "JIT" stream is something that doesn't need a buffer if it's perfect and reliable and consistent enough. The YNAB approach is more about using that buffer.