Optimal Replacement year not exist

[suhimahes]

When the policy could not find the optimal replacement year for one/more assets , the expected total cost for those become NaN .
Are there any arguments to ignore or remedify .

[21ch216]

Hi, can you post the minimal set of commands you used to get this output ? How is your policy parametrized ? Like so, I could reproduce it and understand more precisely your need. Thanks in advance

[suhimahes]

Hi,
Here it is.

a0 = a0.reshape(-1,1)
cf = cf.reshape(-1,1)
cp = cp.reshape(-1,1)

weibull = Weibull().fit(time,event,entry)

policy = AgeReplacementPolicy(weibull, a0=a0, cf=cf, cp=cp, rate = 0.04)
policy.fit()

This is mainly due to an asset does not have a optimal replacement year as below (in this example the first index)

[21ch216]

What are the values of cf, cp, a0 and the estimated parameters of your distribution model ?