• There’s no obvious commercial benefit/ too little return on investment
• System cannot reliably perform as required
• Better resourced competitor(s) have rolled out a more competitive offering
• Too many safety-related accidents/ loss of life
• Project completion would cost a lot more than initially estimated by vendor or contractor/ expected by the customer – now unwilling to pay the higher amount
• Study results do not support the project’s concept (idea)
• Project’s results are no better/ indistinguishable from existing product/ service
• Project will/ is facing significant opposition