Before revision: Accordingly, development was particularly time-consuming; according to BR Chief Operations Manager Robert Amott , the first phase of TOPS involved around 660 man-years of effort, with eight years passing between the start of work and it being declared operational during mid-1968.
After revision: Accordingly, development was particularly time-consuming; according to BR Chief Operations Manager Robert Arnott , the first phase of TOPS involved around 660 man-years of effort, with eight years passing between the start of work and it being declared operational during mid-1968.