 በግል መረጃ ለይቶ ማስተላለፍ የማያስፈልጋቸው ይህም ትስስር ለመመዝገብ አቀራረቦች ጠብቆ የግላዊነት ደግሞ አሉ (Schnell 2013).
However, individual charts are more suited for data that is collected periodically to ensure that a change in the process is not missed (NSSGA, 2013).