There is now a much greater community to draw on to help answer those questions, both from central banks and from academia, in contrast to the situation 25 years ago when inflation targeting was a new frontier.
1 Stevens G and G Debelle (1995), ‘Monetary Policy Goals for Inflation in Australia’, in A Haldane (ed), Targeting  Inflation: a conference of central banks on the use of inflation targets organised by the Bank of England, Proceedings of a Conference, Bank of England, London, pp 81–100.