Generally the problem is that management wants this idea you call "just in time planning" to happen all the time, and even believes it to be synonymous to Agile. Meanwhile the software team is saying, that's fundamentally at odds with the entire premise of how to write software. Saying you want to produce software that was always planned at the drop of a hat (which is what management wants) is like saying you want to chisel Mount Rushmore but you won't tell whose faces should be on it until right at the end. It's just not a coherent goal. My hope with the barriers to anti-quality thing is that we would take things like this, where regardless of what management feels entitled to, and make it sacred and inviolable that the obviously stupid and incoherent things can be vetoed by the feet-on-the-ground people doing the actual work.