Hello! I was assigned a task in the company I work for related to evaluate control limits from SPC charts periodically (yearly). The evaluation is to determine if control limits recalculation is required... this is easy for me to do in terms of reviewing a few charts... the problem is that there are around 5000 SPC charts in all the plant so my manager is asking me to define a "valid" criteria to choose some charts and evaluate them. At the end we are looking to have SPC charts with appropriated control limits (decrease SPC alarms the most). It is important to say that we are using InfinityQS software to monitor SPC charts. Do you have any idea about what to do in this case or have you experienced a similar situation? Thank you in advance for your help, Miguel A.