Monitoring Groups in QC-CALC SPC
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written: 04/13/2009
last modified: 03/22/2024


QC-CALC SPC v.3.2 or higher.


This article discusses the three different types of grouping for the purpose of monitoring. It is fairly common that shops have a large monitor on the floor monitoring the current parts that are being produced. This article shows you how to do this in QC-CALC SPC.


To create/edit groups in QC-CALC SPC, choose either Group > New or Group > Edit at the top of the screen. Groups are saved as .QCG files and typically consist of multiple QCC files. When you turn on Monitoring (via Tools > Enable Monitoring) in QC-CALC SPC, the combination produces the effects detailed below. The Edit menu will only be available when you have a group open. You can open groups similarly to the way you open QCC files. The only difference is that it is done via the Group > Open menu vs. File > Open for opening individual QCC files.

In QC-CALC SPC, when you create a new group, there are three monitoring options you can choose from; QCC Files, QC-CALC Directory, and Latest File in QC-CALC Directory. Each are outlined below.

  1. QCC Files - Creates a group from a distinct list of QCC files you choose and add to the list.
  2. QC-CALC Directory - Creates a group of the currently active QCCfiles from all copies of QC-CALC that are currently contributing to aparticular directory. This group consists of only the active QCC filewithin each copy of QC-CALC. For example, let's say you have threecopies of QC-CALC running on the shop floor measuring parts and addingtheir parts to the directory. As each copy adds data or creates new QCCfiles, the active file of each copy is changing. It is these activefiles (total 3 in the example) that are in the group and are beingmonitored as they change. Therefore, you are actually monitoring QC-CALC copies in this option and not simply files.
  3. Latest File in QC-CALC Directory - This is the same as theQC-CALC Directory option above, but instead only monitors the latestchanged QCC file in the directory. As each copy of QC-CALC updates itsactive file the latest will be displayed.

With QCC Files (#1), you are monitoring specific files. The monitoring of these files will never change unless you do so explicitly through this screen. With QC-CALC Directory (#2), you are monitoring the copies of QC-CALC Real-Time. Therefore, as the Real-Time copies change their currently active QCC file, the monitoring will automatically flip and open new QCC files. It is very powerful since you don't have to know which QCC files to monitor upfront. Instead, you just pick the copies of Real-Time that are on your network and QC-CALC SPC will automatically show you the latest QCC file each Real-Time copy has open at that moment. With Latest File in QC-CALC Directory, you are only monitoring one file at a time. It is the same as looking at the directory in Windows Explorer, sorting by modified date, and then monitoring the one with the latest date. The QCC file will automatically change whenever a new file is being updated.

In the list, you can choose to either monitor or not monitor any individual file or copy of QC-CALC by checking the checkbox in the first (Monitor) column of the list.

In the list, you can also choose how you want to see the QCC file displayed. Choosing "Edit Data" will display the QCC file in Edit Data or Spreadsheet mode. Choosing "Plot Data" will cause the QCC file to appear as a set of plots (identical to QC-CALC Real-Time's display).

When using the QCC Files (#1) option, there is no rule against adding the same file multiple times. For instance, we have customers who will monitor the same QCC file multiple times with different filters applied. For instance, if you had 5 machines making the same part and were capturing this in a factor called Machine Number, you could monitor your different machines separately on the same screen.

To do this, go to Tools > Options > Filter Settings. Check the box that says "Associate Record Filter with a File or Group" and click OK. Then, add the same file to the group 5 times. Tile them so you can see them together. Create 5 filters for machines 1 - 5. Then click each QCC file window, and choose the filter for that file. The result will be a group monitoring the same file 5 times (per the example above) with different filters for each window.


If you have multiple files on screen simultaneously it can be hard to see them all. To arrange them, choose Window > Tile Horizontally or Window > Tile Vertically to automatically fit the windows on to the screen simultaneously.

Applies To

QC-CALC SPC v.4.10
QC-CALC SPC v.3.30
QC-CALC SPC v.3.20


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