Table 1 Circumstances in which a test administered under Type-II UPHCS will be concluded.

From: Utilizing unified progressive hybrid censored data in parametric inference under accelerated life tests

Cases

UHCS

Ending time

Failed units \(c^{*}\)

\(\Re _{i}\)

I

\(Z_{1,m,n}<...< Z_{k,m,n}<...< Z_{m,m,n}<...< Z_{c_{1},n}\)

\(\tau ^{*} = \tau _{1}\)

\(c_{1}\)

\(R_{1},..., R_{k},..., R_{m-1},0,...,0,R_{t_{1}}\)

II

\(Z_{1,m,n}<...< Z_{k,m,n}<...< Z_{c_{1},m,n}<...< Z_{m,m,n}\)

\(\tau ^{*} = Z_{m,m,n}\)

m

\(R_{1},..., R_{k},..., R_{c_{1}},...,R_{m}\)

III

\(Z_{1,m,n}<...< Z_{k,m,n}<...< Z_{c_{1},m,n}<...< Z_{c_{2},m,n}\)

\(\tau ^{*} = \tau _{2}\)

\(c_{2}\)

\(R_{1},..., R_{k},..., R_{c_{1}},...,R_{t_{2}}\)

IV

\(Z_{1,m,n}<...< Z_{c_{1},m,n}<...< Z_{c_{2},m,n}<...<Z_{k,m,n}\)

\(\tau ^{*} = Z_{k,m,n}\)

k

\(R_{1},..., R_{c_{1}},..., R_{c_{2}},...,R_{k^{*}}\)

V

\(Z_{1,m,n}<...< Z_{c_{1},m,n}<...< Z_{k,m,n}<...< Z_{m,m,n}\)

\(\tau ^{*} = Z_{m,m,n}\)

m

\(R_{1},..., R_{c_{1}},...,R_{k},..., R_{m}\)

VI

\(Z_{1,m,n}<...< Z_{c_{1},m,n}<...< Z_{k,m,n}<...< Z_{c_{2},m,n}\)

\(\tau ^{*} = \tau _{2}\)

\(c_{2}\)

\(R_{1},..., R_{c_{1}},...,R_{k},..., R_{t_{2}}\)