Many organizations use the same process capability standard for all their products or services (e. g., 1.33),

Question:

Many organizations use the same process capability standard for all their products or services (e. g., 1.33), but some companies use multiple standards: different standards for different products or services (e. g., 1.00, 1.20, 1.33, and 1.40). What reasons might there be for using a single measure, and what reasons might there be for using multiple standards?