service profit model Investment in securities is conducive to adjusting capital investment and improving the efficiency of capital use, thus guiding the rational flow of resources and realizing optimal allocation of resources. Labour minister John MacDonald (John McDonnell), said the international monetary fund, according to a report of a conservative government "good at cuts in public services, tax breaks for a few rich people, but no hope to invest in our country for the majority of people skills and infrastructure needed for the economic development". Canning's 1929 book, economics in accounting, cites the economist's view that asset values are determined by the present value of the future cash flows of assets. As long as it can stay on the cutting edge in DRAM and memory, Micron can achieve sustained revenue growth. Server, mobile phones, desktop and notebook computer needs more memory and flash memory, because the disk gradually withdraw from the main storage and QLC flash memory as the secondary storage to replace the choice of more powerful.