Non linear constraints in Cornerstone Design of Experiments

The constraint editor of Cornerstone Experimental Design only allows for linear constraints: the involved factors may get a pre factor (coecient) and the resulting weighted sum can be constrained by a certain limit. This can be further restricted to certain levels of categorical factors. General
constraints involving nonlinear functions like log(), exp(), sin(), tan() and even simpler ones like the product of 2 factors are not supported by the editor. As an example we take three factors named d, h2 and alpha. From engineering considerations the term h2 + 3.5 * tan(alpha) + d / (2 * cos(alpha)) has to be restricted to a range between 15 and 35. This is a clear nonlinear constraint that cannot be imposed with the standard editor.

    The fields marked with an asterisk (*) are mandatory.

    You can use this contact form to contact us. We will use your personal data only for the purpose of processing your query. Your contact request will be processed centrally within the camLine Group to ensure that your inquiry can be responded to as quickly and effectively as possible. More detailed information concerning the collection and processing of data in connection with this contact form is available in our Privacy Policy.


    From Saturday, October 16, 2021, 9 am CEST to approximately Sunday, October 17, 2021, 9 am CEST the camLine Support Portal will not be available. In urgent cases, please use your dedicated hotline number or +49 8137 6059 989.