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Simultaneous requirement

Can anyone tell me what exactly this command does? Using 2020 R2
Other than putting SIMTOLX after my FCF I don't see anything different then if I didn't use it.
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  • ASME y14.5m 2009:
    4.19 SIMULTANEOUS REQUIREMENTS
    A simultaneous requirement is where two or more
    geometric tolerances apply as a single pattern or part
    requirement. A simultaneous requirement applies to
    position and profile tolerances that are located by basic
    dimensions, related to common datum features referenced
    in the same order of precedence at the same
    boundary conditions. In a simultaneous requirement
    there is no translation or rotation between the datum
    reference frames of the included geometric tolerances,
    thus creating a single pattern. Figures 4-39 and 4-40 show
    examples of simultaneous requirements. If such interrelationship
    is not required, a notation such as SEP REQT is
    placed adjacent to each applicable feature control frame.
    See Figs. 4-41 and 7-54 and para. 7.5.4.2. This principle
    does not apply to the lower segments of composite feature
    control frames. See para. 7.5.4.2. If a simultaneous
    requirement is desired for the lower segments of two or
    more composite feature control frames, a notation such
    as SIM REQT shall be placed adjacent to each applicable
    lower segment of the feature control frames.


    Here's figure 4-39 example


    IF the Profile and Position feature control frames are referenced/related to each other via BASIC dimensions, rotation is controlled to each other, simultaneously based on AME actual mating envelopes of the hole patterns vs the profile pattern.

    IF the print is a "Reduced dimension drawing", reference the print notes, to see if dimensions are referred to as basic, or a generic ± tolerance. If Basic see above, if generic ±tol, then NO the rotation doesn't apply.
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  • ASME y14.5m 2009:
    4.19 SIMULTANEOUS REQUIREMENTS
    A simultaneous requirement is where two or more
    geometric tolerances apply as a single pattern or part
    requirement. A simultaneous requirement applies to
    position and profile tolerances that are located by basic
    dimensions, related to common datum features referenced
    in the same order of precedence at the same
    boundary conditions. In a simultaneous requirement
    there is no translation or rotation between the datum
    reference frames of the included geometric tolerances,
    thus creating a single pattern. Figures 4-39 and 4-40 show
    examples of simultaneous requirements. If such interrelationship
    is not required, a notation such as SEP REQT is
    placed adjacent to each applicable feature control frame.
    See Figs. 4-41 and 7-54 and para. 7.5.4.2. This principle
    does not apply to the lower segments of composite feature
    control frames. See para. 7.5.4.2. If a simultaneous
    requirement is desired for the lower segments of two or
    more composite feature control frames, a notation such
    as SIM REQT shall be placed adjacent to each applicable
    lower segment of the feature control frames.


    Here's figure 4-39 example


    IF the Profile and Position feature control frames are referenced/related to each other via BASIC dimensions, rotation is controlled to each other, simultaneously based on AME actual mating envelopes of the hole patterns vs the profile pattern.

    IF the print is a "Reduced dimension drawing", reference the print notes, to see if dimensions are referred to as basic, or a generic ± tolerance. If Basic see above, if generic ±tol, then NO the rotation doesn't apply.
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