Twenty-one experts participated in the third run. The mean,
standard deviation, mode, and quartile of each indicator were
carefully calculated. Consensus was not reached for four standards
(quartile > 1, mean < 3.5, mode < 4, standard deviation > 1),
namely “purchase at least 5 government approved green products”,
“encourage employees to provide green ideas”, “encourage
customers to sort waste after dining”, and “donate green food or
meals to non-profit organizations or disadvantaged minorities and
educate them about green cooking”. One standard was evaluated
as unimportant, namely “Apply renewable energy (use equipment
with renewable power)” (mean < 3.5). After deleting the five items
mentioned above, 81 green standards were eventually established:
besides five indicators for the new established restaurant, the
remaining 76 were standards for existing restaurants in Taiwan.
Linstone and Turoff (2002) considered a change of less than 15%
for each item between the two surveys evaluated by all experts
to indicate stability. The alternative option is total stability which
describes the mean stabilities of all the items equaling or exceeding
70%. The total stability of this study was 86.32%, indicating high
stability and credibility.