Initial addition to mortality improvements parameter (A)
\ɪˈnɪʃəl\ \əˈdɪʃən\ \tu\ \mɔrˈtæləti\ \ɪmˈpruvmənts\ \pəˈræmətər\
An advanced parameter of the CMI mortality projections model that was introduced in the 2018 model, which allows users to alter short-term rates.