Orchestrator FAQ (#6252)

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Orchestrator/docs/FAQ.md

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+# Frequently Asked Questions
+
+### What are the primary scenarios supported by Orchestrator?
+Primary scenario currently supported is routing/dispatching (intent only).  We are working on supporting entities extraction for future releases.
+
+
+### Can Orchestrator be used from Composer?
+Yes.  Follow documentation [here][13] to use Orchestrator as recognizer in Composer.
+
+### Can you use both Orchestrator and LUIS in the same bot?
+Yes, definitely.  You could use Orchestrator (OrchestratorRecognizer) to route incoming utterances to the right child applications (i.e., LUISRecognizer, QnAMakerRecognizer).
+
+
+### What are the guidelines for when Orchestrator correctly predicts incoming utterance for sub intent (app/skill) but the sub app fails to return the right intent?
+We recommend tuning the sub app models (i.e. LUIS/QnAMaker/Orchestrator) using the recommended best practices for the app.  
+- To improve LUIS model, follow instructions [here][1].
+- To improve QnAMaker kb, follow guidelines [here][2].  
+- To improve Orchestrator, follow guidelines [here][3].
+
+
+### Which languages will be supported in Orchestrator multilingual models?
+Orchestrator multilingual models currently supports 8 languages (EN, ES, DE, FR, IT, JA, PT, and ZH).  See [Orchestrator base models][14] for more information on specific models.  We are constantly looking to expand the number of supported languages and if a language is not yet supported, Azure translation could be used to translate incoming utterance to English first before passing it to Orchestrator.  
+
+### Does Orchestrator replace LUIS Dispatch?
+LUIS based [Dispatch][5] is on the path to be deprecated, although the exact timeline is not yet finalized.  Now is a good time to start evaluating Orchestrator as an alternative to Dispatch.
+
+
+### Does Orchestrator support entity extraction?
+Not at the moment, but we are working on it for future releases.
+
+
+### What is the guidelines in choosing Orchestrator vs LUIS?
+We recommend evaluating each solution against your data and see which performs better.  Both LUIS based [Dispatch CLI][5] and [BF Orchestrator CLI][6] come with a command to evaluate training and test data.
+
+### Could you combine Orchestrator to predict intent and LUIS for entity?
+Unfortunately not.  However, Orchestrator Recognizer could take external entity recognizers.  Look [here][7] for supported entity recognizers.
+
+### How do you migrate from Dispatch solution to Orchestrator solution?
+[BF Orchestrator CLI][6] comes with commands similar to [Dispatch CLI][5] commands.  bf orchestrator:create command also takes existing .dispatch file generated from Dispatch CLI for easy migration.  See [Dispatch Migration][12] documentation for more information.
+
+### References
+* [Orchestrator][8]
+* [Composer][9]
+* [LUIS][10]
+* [QnAMaker][11]
+
+[1]:https://docs.microsoft.com/en-us/azure/cognitive-services/luis/luis-how-to-use-dashboard
+[2]:https://docs.microsoft.com/en-us/azure/cognitive-services/qnamaker/how-to/test-knowledge-base?tabs=v1
+[3]:https://github.com/microsoft/BotBuilder-Samples/blob/main/experimental/orchestrator/CLI/ModelTuning/README.md
+[4]:https://github.com/pytorch/fairseq/tree/master/examples/xlmr#introduction
+[5]:https://github.com/microsoft/botbuilder-tools/tree/master/packages/Dispatch
+[6]:https://github.com/microsoft/botframework-cli/tree/main/packages/Orchestrator
+[7]:https://github.com/microsoft/botbuilder-dotnet/tree/main/libraries/Microsoft.Bot.Builder.Dialogs.Adaptive/Recognizers/EntityRecognizers
+[8]:https://aka.ms/bf-orchestrator
+[9]:https://github.com/microsoft/BotFramework-Composer
+[10]:https://docs.microsoft.com/en-us/azure/cognitive-services/luis/what-is-luis
+[11]:https://docs.microsoft.com/en-us/azure/cognitive-services/qnamaker/overview/overview
+[12]:https://github.com/microsoft/botframework-sdk/blob/tiens-patch-1/Orchestrator/docs/DispatchMigrationExample.md
+[13]:https://github.com/microsoft/BotFramework-Composer/blob/main/docs/preview%20features/orchestrator.md
+[14]:https://github.com/microsoft/botframework-sdk/blob/main/Orchestrator/docs/NLRModels.md