Technical FAQ

Entering UCL, LCL and CL

  • Does InfinityQS allow me to enter in my own Upper and Lower Control Limits?

    InfinityQS is absolutely committed to the accurate and correct application of statistical process control. We are so committed to statistical accuracy that we employ several degreed Industrial Statisticians to work closely with our clients and developers to ensure statistical validity and accuracy.

    Our commitment to statistical methods and their correct use is why our control limits are created by specifying a mean and a standard deviation (sigma). Why? Because Shewhart Control Chart limits are ONLY supposed to be based on the correct mean and standard deviation for a given subgroup size, n. By requiring users to type in a mean and standard deviation, InfinityQS ensures that the control limits are actually based on this extremely important statistical requirement: control limits must be based on the MEAN, and the STANDARD DEVIATION for a specific subgroup size.

    A serious statistical flaw of all of our competitors is that they actually allow users to type in control limits without regard to standard deviation, and without regard even to subgroup size. Therefore, these supposed "control limits" represent what? A "best guess" on the part of the user, or maybe they represent the engineering specification limits. Either way, typing in control limits without considering the standard deviation and subgroup size is simply erroneous. It is a violation of everything that statistical process control is about.

    It might be simple, but typing in control limits is not statistically sound. Those typed-in "control limits" most likely do not represent the actual process variation (as evidenced by the standard deviation), unless the user actually knows what the standard deviation, mean and subgroup size are. And if the user actually knows the mean, standard deviation and n, why would they ever want to type in control limits? If they already know the mean, standard deviation and subgroup size, why not just type them in at one time? In fact, doing this is far more efficient. Think about it. If the user must type in an upper and lower control limit and mean for the xbar chart, they must do the same thing for the associated range or sigma chart. InfinityQS needs, for variables charts, only a mean, standard deviation and n. This is a far more correct, even efficient way of handling the creation of control limits. Related control limits are back-calculated automatically given the mean, sigma and n--even if the subgroup size varies.

    How could our competitors have made the incredibly serious error of allowing users to type in control limits? Because most of our competitors do not have the depth of knowledge in statistical methods that InfinityQS possesses. In fact, few if any competitors actually employ a statistician--much less several Industrial statisticians.

    It may be different compared to our competition, but InfinityQS uses a statistically valid and mathematically correct method of allowing users to specify control limits.

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Report Manipulation

Supporting Six Sigma

  • Can InfinityQS software support an organization through "SIX SIGMA"?

    Yes, InfinityQS can support a 6 Sigma implementation. Listed below are some supported 6 Sigma requirements: Control charts for both variable, defects and defectives data.

    • Advanced Pareto Analysis to support defect management, analysis, defect weighting analysis, cumulative defect counts through several process operations.
    • Million-way sorting of defects (by part, by process, by operator, by operation, by supplier, by anything tagged to the data.
    • Easy import and export between 3rd party applications (e.g. Excel, Minitab, StatGraphics, JMP, Statisticia).
    • InfinityQS is a widely used by major corporations that have adopted the 6 Sigma philosophy - Honeywell (formally AlliedSignal), Johnson & Johnson (Ethicon Endo Surgery, Cordis), Solectron

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Automatic Notification

  • Does InfinityQS notify operators in real-time when checks are required to be done?

    Yes, If the operator is supposed to take data at a certain time, InfinityQS can remind them with a "sampling period" requirement. But, if the operator does not enter data within the specified time window, then InfinityQS can optionally send a sampling period violation (process action) to the database, send an email(s), and optionally lock out the operator from further data collection until an ACC and a CAC have been identified.

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  • Does InfinityQS display alarms in real-time?

    Yes. InfinityQS can alarm on all Western Electric statistical alarms, as well as non-statistical alarms such as: Disabled subgroup, out of specification and bad subgroup size. Additionally, you edit the default alarm rules as well as create your own custom alarms rules. All alarm rules are customizable. Up to 32 unique rules can be enabled.

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  • Does InfinityQS software provide automatic notification features?

    Any alarm violation can trigger Process Event records to be recorded. These events can cause email notification to be sent to a user specified list based on Part+Process+Test options.

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Foreign Languages

Attribute and Variable Data

Input From Gages

Database

  • What SQL Servers / Oracle versions has InfinityQS been tested / certified on?

    InfinityQS' ProFicient has been designed to be compatible with a variety of backend databases such as Oracle, SQL Server, Sybase and others. ProFicient communicates with the backend database through the industry standard ODBC 3.5 protocol. Therefore, virtually any database that supports the basic language syntax and functionality provided by this standard can be utilized as the backend database for ProFicient. (Note: The ODBC 3.5 standard is closely matched to the SQL-92 standard.)

    Because ProFicient is designed to be database independent and not designed to rely on a specific database platform, InfinityQS does not certify a specific backend database for use with ProFicient. InfinityQS does make the following recommendations when selecting a backend database for use with ProFicient:

    • An n-tier client/server database should be utilized in any multi-user environment. This includes SQL Server, Oracle, Sybase and others. Access is NOT recommended in a multi-user environment.
    • The database vendor's most current version of ODBC driver compliant with the ODBC 3.5 standard should be utilized. This is important because there are often bug fixes and/or performance enhancements incorporated into the database vendor's newest ODBC driver versions.

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  • Does InfinityQS utilize a relational database?

    Yes, InfinityQS will use any ODBC compliant database you wish to use.

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Software Maintenance

Security Features

DDE Setup

Recalculating Control Limits

Automatic Updating in Real Time

Time/Date Stamping

Custom Screens

Creating SPC Projects

Note and Comment Fields

  • Does InfinityQS allow for comment fields to any data entered?

    Yes. You may enter Assignable Cause Codes (ACCS) and Corrective Action Codes (CACs) as well as enter free-form comment fields for any subgroup of data. Once entered, these comments show up in real time right on the control chart. You do not have to double-click a subgroup or go to another window to see the comments. Instead, InfinityQS displays displays the comments, ACCs and CACs on the control chart in plain view of the user.

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