The document discusses different budgeting methods:
1) Incremental budgeting vs zero-based budgeting, with incremental being simpler but less innovative, while zero-based requires justifying all costs but is complex.
2) Top-down budgeting sets constraints from high levels but risks inaccuracies, while bottom-up involves staff but risks exaggeration.
3) A mixed approach using elements of different methods can balance involvement with oversight. Zero-based budgeting may work for selective areas to drive efficiency.