User's Manual

190
Chapter 9
To designate a branch as the scoring branch (Tools menu)
E Connect the model nugget to a terminal node ( a proces sing or output node downstre am fr om
the nugget).
E On the main menu, click:
Tools > Stream Properties > Deployment
E On the Deployment type list, click Scoring Only or Model Refresh as required. For more information,
see the topic Stream Deployment Options on p. 185.
E Click the Scoring node field and select a terminal node from the list.
E Click OK.
Model Refresh
Model refresh is the process of rebuilding an existing m odel in a s tream usi ng newer data.
The stream itself doe s not change in the repository. For example, the algorithm type and
stream-specific settings remain the sa me, but the model is ret r ained on new data, and updated
if the new version of the model works better than the old one.
Only one mo del nugget in a stream can be set to refresh—this is known a s the refresh model. If
you click the Model Refresh opt ion on t he Deploym ent tab of the stream properties (see Stream
Deployment Options on p. 185), the model nugget that you designate at that time becomes the
refresh model. You can also d esignate a model as the refresh model from the pop-u p menu of a
model nugget. The nugget must already be on the sco r ing branch for this to be possible.
If you turn off the “refresh m odel” status of a nugget, this is eq uivalent to setting the deployment
type of the stream to Sco r ing Only, and the Dep loyment tab of the strea m properties dialog box is
updated accordingly. You can turn this status on and off by means of the Use as Refresh Model
option on the pop-up menu of the nugget on the current scoring bra nch.
Remov ing the model link of a nugget on the scoring branch also removes the “refresh model”
status of the nugget. You can undo removal of the model link by means of the Edit menu or the
toolbar; doing so also reinstates th e “refresh model” status of the nugget.
How the Refresh Model is Selected
As well as the scoring branch, the link to the refresh m odel is also highlighted in the stream. The
model nugget chosen as the refresh model, and therefore the link that is highlighte d, depends on
how many nuggets are in the stream.