Method for monitoring a production process and corresponding technical issues

A method executable by a computing system, the method comprising:

• receiving data regarding a technical parameter whose values have an asymmetric distribution, the technical parameter being a parameter of units produced in a production process;
• determining an asymmetric interval in the asymmetric distribution, the asymmetric interval being asymmetric with regard to a characteristic value of the asymmetric distribution;
• comparing at least one value of the technical parameter with the asymmetric interval to obtain at least one respective comparison value, wherein the at least one value of the technical parameter is generated by taking samples of the parameter of the units produced in the production process according to a sampling plan specifying a sample size and/or a sample time/time interval;
• and
• taking a preventative action based on the at least one respective comparison value, the preventative action comprising stopping the production process,
• wherein the asymmetric distribution is an asymmetric probability density function or an asymmetric cumulative distribution function, and wherein the method further comprises:
• determining an upper value for an upper limit of the technical parameter;
• and
• determining a lower value for a lower limit of the technical parameter,
• wherein the asymmetric interval comprises differences of the upper value and the lower value with respect to the characteristic value such that a first difference of the upper value and the characteristic value is different from a second difference of the characteristic value and the lower value,
• wherein the upper value indicates an upper control value,
• wherein the lower value indicates a lower control value,
• wherein there is a first difference between the upper control value and the characteristic value,
• wherein there is a second difference between the characteristic value and the lower control value,
• wherein the second difference is at least 10 percent longer than the first difference or wherein the first difference is at least 10 percent longer than the second difference, and
• wherein the lower control value or both the upper and the lower control values are different from zero,
• wherein the units produced in the production process are autoinjectors or multi dose pens or parts thereof,
• wherein the units comprise at least one of:
• a housing part,
• a piston rod arranged in the housing part,
• a driving mechanism for the piston rod, and
• a cap attached to the housing part or configured to be attached to the housing part.

A method executable by a computing system, the method comprising:

• receiving data regarding a technical parameter whose values have an asymmetric distribution, the technical parameter being a parameter of a production process or a parameter of units produced in the production process;
• determining an asymmetric interval in the asymmetric distribution, the asymmetric interval being asymmetric with regard to a characteristic value of the asymmetric distribution;
• automatically comparing at least one value of the technical parameter with the asymmetric interval to obtain at least one respective comparison value, wherein the at least one value of the technical parameter is generated by taking samples of the parameter of the production process or of the parameter of the units produced in the production process according to a sampling plan specifying a sample size and/or a sample time/time interval;
• and
• taking a preventative action based on the at least one respective comparison value, the preventative action comprising at least one of generating automatically a warning signal or stopping the production process, wherein the preventative action is an action according to an out-of-control action plan, wherein the action according to an out-of-control action plan requires to adjust a technical parameter of the production process,
• wherein the asymmetric distribution is an asymmetric probability density function or an asymmetric cumulative distribution function, and wherein the method further comprises:
• determining an upper value for an upper limit of the technical parameter;
• and
• determining a lower value for a lower limit of the technical parameter;
• wherein the asymmetric interval comprises differences of the upper value and the lower value with respect to the characteristic value such that a first difference of the upper value and the characteristic value is different form a second difference of the characteristic value and the lower value,
• wherein the upper value indicates an upper warning value,
• wherein the lower value indicates a lower warning value,
• wherein there is a first warning difference between the upper warning value and the characteristic value,
• wherein there is a second warning difference between the characteristic value and the lower warning value,
• wherein the second warning difference is at least 10 percent longer than the first warning difference or wherein the first warning difference is at least 10 percent longer than the second warning difference,
• wherein the lower warning value or both warning values are different from zero,
• wherein the units produced in the production process are autoinjectors or multi dose pens or parts thereof, and
• wherein the units comprise at least one of:
• a housing part,
• a piston rod arranged in the housing part,
• a driving mechanism for the piston rod, and
• a cap attached to the housing part or configured to be attached to the housing part.