Manufacturing, in any capacity, is a high-cost, ever-changing industry. The sector places unique demands on decision-makers - it can be hard to know where to invest the often limited resources available.
IT is far from the only part of your infrastructure that calls for investment. Physical plant and machinery need updating, you need to hire highly skilled engineers, not to mention other investment opportunities like plant expansion through mergers.
It can be hard, then, to allocate available funds for the best return.