the Weibull++ parametric RDA folio, what is the difference
between the GRP and Eta/RF parameterization?
For repairable system analysis, the
parametric RDA folio is based on the general renewal process
(GRP) model, which uses the concept of virtual age to mathematically
capture the effect of repairs on the subsequent rate of
occurrence of failure (i.e., failure intensity). The rate
of occurrence of failure over time is modeled by the power
law function. This means that the GRP analysis method has
three parameters, two of which are used to describe the
power law function and a third for estimating the virtual
age of a system.
In Version 8, the parametric RDA folio allows you to
select how you want the parameters to be calculated. By
default, the software calculates the beta, lambda and
q parameters. However, if you want to publish
the model and use it in
then you need to express the power law parameter, lambda,
in terms of the Weibull parameter, eta, and
you need to express the virtual age parameter, q, in terms
of the RF parameter (which users of BlockSim
will recognize as the restoration factor of a maintenance
action). To do this, select the check box in the Parameterization
area shown next.
The relationship between the lambda (λ) and eta (η) parameters
is described as:
The relationship between the q and RF parameters is described
To learn more about the GRP model and the mathematical
concept behind virtual age, see
a Synthesis repository, how do I change the project owner
for an existing project?
Each project in a Synthesis repository has a single project
owner. The project owner for a particular project has full
permissions within the project. This includes read/write
access to all the project items, the ability to modify the
properties of the project and its security settings, the
ability to create/edit/delete project resources and the
ability to delete the project.
By default, the project owner is the user who created
the project. The project owner, or any user who has the
"Manage all projects" permission in the repository, can
assign a different user to be the owner for the project
by selecting the project name in the project list and choosing
Project > Security > Change Owner.
Users with the "Manage all projects" permission can also
select multiple projects and assign one user to be the owner
of those projects via the Manage Projects window. To access
this window, choose Project > Management > Manage