Acceleration factor QCP in Weibull

[Nath]

What equation does the Weibull++ QCP use for calculating acceleration factors? Is it based of the eta parameter for Weibull case?

Thanks in advance

[tarik]

I presume you are referring to ALTA not Weibull++. For equations refer to:
http://www.weibull.com/AccelTestWeb/acceleration_factor.htm
http://www.weibull.com/AccelTestWeb/acceleration_factor.htm
http://www.weibull.com/AccelTestWeb/eyring_acceleration_factor.htm
http://www.weibull.com/AccelTestWeb/t_h_acceleration_factor.htm
http://www.weibull.com/AccelTestWeb/t_nt_acceleration_factor.htm
http://www.weibull.com/AccelTestWeb/ipl_acceleration_factor.htm
http://www.weibull.com/AccelTestWeb/acceleration_factor_plots.htm

[Nath]

Yes Alta. I would like to know about the acceleration factor in the proportional hazards model. Like the example shown in Reliability Hotwire magazine. Thanks

[Pantelis]

Accleration factor is simply the ratio of the expected life characteristic at use conditions and accelerated conditions.

Life is obtained per the model. In the case of a PH model, life can be obtained per equation 1 as given in http://www.weibull.com/AccelTestWeb/general_log_linear_model.htm