In preparing, formulating and filing a Federal Disability Retirement application under FERS or CSRS, it is helpful to make an initial conceptual distinction between the type of positional duties which one performs for the Federal Service — whether sedentary and administrative; whether it involves the necessity of on-demand travel or deployment; whether the particular medical condition requires special medical care or technology and apparatus which is not available upon travel or deployment; how physical; weight lifting requirements; how repetitive; whether driving is required; whether and to what extent it is cognitive-intensive; and multiple other considerations. […]