ISO 14405-1:2016

ISO 14405-1:2016 establishes the default specification operator (see ISO 17450-2) for linear size and defines a number of special specification operators for linear size for features of size, e.g. "cylinder", "sphere", "torus,"[1], "circle", "two parallel opposite planes", or "two parallel opposite straight lines".
It also defines the specification modifiers and the drawing indications for these linear sizes.
It covers the following linear sizes:
a)    local size:
-      two-point size;
-      spherical size;
-      section size;
-      portion size;
b)    global size:
-      direct global linear size:
-      least-squares size;
-      maximum inscribed size;
-      minimum circumscribed size;
-      minimax size;
-      indirect global linear size;
c)    calculated size:
-      circumference diameter;
-      area diameter;
-      volume diameter;
d)    rank-order size:
-      maximum size;
-      minimum size;
-      average size;
-      median size;
-      mid-range size;
-      range of sizes;
-      standard deviation of sizes.
ISO 14405-1:2016 defines tolerances of linear sizes for the following:
-      a + and/or - limit deviation (e.g. 0/-0,019);
-      an upper limit of size (ULS) and/or lower limit of size (LLS) (e.g. 15,2 max., 12 min., or 30,2/30,181);
-      an ISO tolerance class code in accordance with ISO 286-1 (e.g. 10 h6);
with or without modifiers.
ISO 14405-1:2016 provides a set of tools to express several types of size characteristic. It does not present any information on the relationship between a function or a use and a size characteristic.
[1]         A torus is a feature of size when its directrix diameter is fixed.