Transcript No Slide Title

Reliability Prediction Lab
Last revised 08/30/2005
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Introduction
This lab will walk the user through the steps involved in
performing a Reliability Prediction using ASENT.
First, a new project will be created in ASENT and then the
product tree structure will be built. Components will be added
to the part library, and part lists will be created for some of the
boards. Failure rates will be calculated, and reports will be
generated.
Please refer to the ASENT Reliability Prediction and
Importing Board Data presentations for additional topics not
covered in this simple lab.
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Step 1: Creating A New Project
The first thing we will do is create a new project in
ASENT. This is accomplished in the ASENT Session
Manager. The slides that follow will guide you
through these steps.
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Create the New FRP Project
Create a new failure rate
prediction (FRP) project.
From ASENT’s Session
Manager select the
Project menu option and
select the ‘New’ option.
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Create New FRP Project
For the project name enter
your <last name>_frp. For
example, if your last name
is Smith, then enter
smith_frp for your project
name. Fill in the other
information as shown in
this example, then click on
the Save button.
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Step 2: Adding New Parts to the Library
The next thing we will do is add some new parts to
ASENT’s part library. ASENT’s part libraries consist
of thousands of electronic and mechanical parts, but
new parts can be added very easy. This is
accomplished in the ASENT Component Data
Manager. The slides that follow will guide you
through the steps of adding new parts to your library.
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Invoking the Component Data Manager
The Component Data
Manager is the tool in
ASENT that is used to
manage your part libraries.
A part must first be defined
in a part library before it
can be used as part of a
prediction.
The Component Data
Manager can be invoked
from either the Session
Manager or the Reliability
Manager. Here, we invoke
it from ASENT’s Session
Manager by selecting
‘Library Data’ and the
‘Component Data
Manager’ option.
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Adding an Analog Microcircuit – Step 1
The first part that we will
add to the library is an
analog microcircuit. Click
on the ‘+’ symbol next to
your frp project to display
the part type folders, and
click on the ‘+’ symbol
next to Microcircuit to
display the sub-type
folders.
Right-click on ‘Analog
Microcircuits’ and select
the ‘Add’ option from the
drop-down menu.
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Adding an Analog Microcircuit – Step 2
Fill in the data, as shown,
for your new analog
microcircuit, then click on
the Save button.
Here, we are defining a
new analog microcircuit for
the smith_frp project part
library.
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Analog Microcircuit is Added
This screen shows the new
analog microcircuit that
was just added when you
clicked on the Save button.
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Adding a RLR Style Resistor – Step 1
The next part that we will
add to the library is a RLR
style resistor. Click on the
‘+’ symbol next to the
Resistor part type folder,
and click on the ‘+’
symbol next to Fixed
Discrete to display the style
folders.
Right-click on ‘RLR’ and
select the ‘Add’ option
from the drop-down menu.
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Adding a RLR Style Resistor – Step 2
Fill in the data, as shown,
for your new resistor, then
click on the Save button.
Here, we are defining a
new RLR style resistor for
the smith_frp project part
library.
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RLR Style Resistor is Added
This screen shows the new
RLR style resistor that was
just added when you
clicked on the Save button.
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Step 3: Creating A Product Tree Structure
The next thing we will do is create a product tree
structure in ASENT. This is accomplished in the
ASENT Reliability Manager.
Here, we will build the product tree structure and
calculate failure rates. Later, we will generate reports.
The slides that follow will guide you through these
steps.
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Adding a Subassembly
To add a subassembly to
our product tree, rightclick on the project
node and select the
‘Add SubAssy / Board’
option from the dropdown menu.
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Adding Subassembly Subsys1
Fill in the data as shown
here and click on the Save
button.
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Adding a Board
To add a board as a
child of subsys1, rightclick on the ‘subsys1’
node that was just
added, and select the
‘Add SubAssy / Board’
option from the dropdown menu.
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Adding Board1
Fill in the data as shown
here and click on the Save
button.
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Making a Copy of Board1
The Ctrl-Drag-Drop
convention works for
copying items in your
product tree. To make a
copy of board1, hold the
Ctrl key down, left-click
on Board1, drag and
drop it on subsys1. After
the copy your screen
should appear as shown
here.
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Making a Copy of Board1
Change the name of the
new board1 to board2,
and modify the other data
as shown. Click on the
Save button.
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Board2 is Now a Copy of Board1
After the modifications,
the new board should
appear as shown. It is a
copy of board1.
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Importing a Board From Another Project – Step 1
ASENT gives you the
ability to quickly import
items from other project
trees. In the next few
slides you will import
the Sound card from the
DEMOCD_PRJ project.
This is a sample project
that comes on the
ASENT Software CD. If
this project does not
exist on your server, then
select another one for
this example.
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Importing a Board From Another Project – Step 2
You are presented a list of
all of the projects that
exist on your server.
Select the
DEMOCD_PRJ project
and click on the OK
button.
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Importing a Board From Another Project – Step 3
The product tree for the
DEMOCD_PRJ project
will appear. Initially, the
tree will be fully
collapsed. Click on the
‘+’ symbol next to the
project node and do the
same thing for the
chassis. Select the
SOUND board and
click on the OK button.
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The SOUND Board Has Been Imported to Your Project
The screen shows
the result after the
SOUND board has
been imported.
Notice, that the
SOUND board has
been added as a
child of subsys1.
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Adding a Part to Board1’s Part List – Step 1
To add a part to
Board1, follow
these steps: 1) click
on the ‘+’ symbol
next to board1 to
display the Parts
container, 2) Rightclick on the Parts
container and
select the ‘Add’
option from the
drop-down menu.
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Adding a Part to Board1’s Part List – Step 2
Enter ‘U1’ for the
Reference Designator
(Ref. Des.) value, and
click on the
button.
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Adding a Part to Board1’s Part List – Step 3
The Select a Part window
appears with a list of
projects. Scroll down, if
necessary, to locate your
FRP project.
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Adding a Part to Board1’s Part List – Step 4
Click on the ‘+’ symbol
next to your project to
expand the project
folder, and click on the
‘+’ symbol next to All
to display all of the part
that have been added to
the FRP project part
library.
Select the ‘CLASSPRT0001’ part that we added
earlier, and click on the
OK button.
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Adding a Part to Board1’s Part List – Step 5
This screen shows
that we have assigned
reference designator
U1 to the
CLASSPRT-0001
part from the
smith_frp part library.
Click the Save button
to add the part to
board1’s part list.
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Adding a Part to Board1’s Part List – Step 6
Part U1 now appears
in the part list for
Board1.
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Adding a Group of Parts to Board1’s Part List – Step 1
In this example, we
use ASENT to
create a group of
components. In the
screens that follow
we will add five
resistors (R1-5) to
our part list.
Right-click on
board1’s part
container and
select ‘Add Group’
from the drop-down
menu.
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Adding a Group of Parts to Board1’s Part List – Step 2
When the Add Group window appears,
fill in the information as shown here, and
click on the
button.
Next, select the CLASSPRT-0002
part and click the OK button.
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Adding a Group of Parts to Board1’s Part List – Step 3
Notice, that the project and part number values are now
populated in the Add Group window. Here, we are telling
ASENT to create five references (R1-R5) to part number
CLASSPRT-0002 from the smith_frp part library. Click
the OK button.
After the OK button has
been pressed, there will be
a slight delay, and then the
five parts will appear in the
part list, as shown here.
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Set the Operating Failure Rate of Board2 to 5.0
Sometimes we may
use a vendor supplied
failure rate, field
failure rate, or a value
derived from
comparative analysis.
Here, we user set the
failure rate value to
5.0 failures/million
hrs.
Check the checkbox next to the Failure Rate field, enter 5 for
the failure rate, and click on the Save button.
By checking the
checkbox next to the
failure rate field you
can either enter a
failure value or click
on the MTBF button
to enter a MTBF.
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Set the Prediction Method, Environment, Temperature
Define the failure rate
prediction method,
environment and
temperature that
ASENT will use to
calculate failure rates.
Click on the project
node. The right side
of the screen will
display information
that corresponds to
the project node. Fill
in the information as
shown here and click
on the Save button.
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Calculate Failure Rates
To calculate failure
rates for the entire
system, right-click on
the project node and
select ‘Calculate
Failure Rates’ from
the drop-down menu.
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Calculate Failure Rates
When the Failure Rate Calculator
window appears, click on the
‘Calculate’ button.
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Generate Reports
To generate a standard
reliability prediction
report, right-click on
the project node, and
select the ‘Reports |
Op Tree FR | Sorted
by RD’ options from
the drop-down menus.
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Generate Reports
When the Enter Parameter Values
window appears click on the OK
button.
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Generate Reports
After a short delay, the
report viewer window
will appear, displaying
the report.
Click on the
icon to
print the report. The
icon is used to export the
report to a file.
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