Sufficient
Ensured access to sufficient food for all people at all times
The idea of sufficiency implies a threshold below which access would be inadequate. Obvious as this idea appears, the challenge of measurement in the real world is substantial. This challenge notwithstanding, it is essential to have a standard objective threshold against which access to food can be quantified and compared; it is, otherwise, not possible to adhere to the basic principles of international humanitarian law related to neutral and impartial prioritization of assistance based on relative need. While nutritional standards (Global Acute and Severe Acute Malnutrition rates) provide one possible threshold, these are, by definition, not early warning thresholds. Signs of malnutrition emerge well after people’s access to food has been compromised. The other practical standard is the international minimum food energy standard of 2100 kilocalories per person per day. 
Although this standard does not encompass the wider diversity and nutrient requirements related to good nutrition, it does provide a useful absolute minimum threshold for determining (at least) the need to launch an emergency intervention aimed at preventing widespread acute hunger. FEG Consulting incorporates this basic energy requirement into the survival and livelihood protection thresholds.
