This project aims to deliver an engine sitting on top of Amazon Connect which has the capability to build a hyper-personalised IVR (DTMF and NLU) experience for your customers across voice and chat channels.

Rules Engine for Amazon Connect (Rules Engine) is an open source, self-hosted web application providing the ability to build, test and deploy customer experiences based on a set of prioritised rules.

Rules Engine provides pre-built rule types for you to use (17 types of rules are currently provided) which are the functional units of a consistent and exceptional customer experience.

Each rule is self-defined, triggering an action when certain conditions (defined by the user) are met.

The Rules Engine web application offers a simple user interface to create, test, deploy and manage rules using a single pane of glass, removing the undifferentiated heavy lifting for creating and managing complex customer experiences.

This allows you to focus on creating and improving customer experiences, instead of spending time on managing contact flows, testing and deployment.

Rules Engine makes it easy to create, manage, configure, test and deploy contact experiences.

Rules Engine is built with consistency and reusability in mind. With consistency, the process of creating a rule is always the same, using a pre-built template, populating fields based on the desired experience.

In terms of reusability, modular customer experiences often have common inputs, outputs and conditions. Rules Engine provides the ability to share and clone rules, allowing you to build patterns knowing you can easily reuse the rules, creating units of reusable contact experiences.

Rules Engine organises rules into rulesets (a group of rules). The Rules Engine interface provides the flexibility to name, arrange and nest rulesets, presenting a simple view for rulesets as a folder-like structure.

This makes it easy to find, manage and configure rules, especially for large scale customer experiences. Rulesets from an environment can be easily exported as a single JSON data file, stored in version control and imported into higher environments, ensuring that business logic can be effortlessly migrated between customer Rules engine instances.

Rules Engine provides an interactive interface simulating the customer experience journey step-by-step. This helps experience creators understand and debug the experience, accepting optional mock input data for the experience interaction.

All customer experiences created in Rules Engine are testable and assertable. An integrated testing interface is provided within Rules Engine for testing the end-to-end experience through test scripts.

Similar to rules, tests can be grouped into folders, allowing for easy management. Executed tests also report the coverage of all rule sets and customers can leverage this to ensure all customer paths are tested.

The Rules Engine solution is open-source, providing full read-access to all files required to deploy and update Rules Engine, and can be integrated with almost any CICD pipeline.

With the pipeline set up, any rules created or modified can be easily deployed to the Amazon Connect instance, reducing deployment risks by tracking changes through CICD setup and version control, providing the ability to rollback to a previous state in the unfortunate event of an unsuccessful deployment.

Customers want to feel valued, and to achieve this, one way is to provide a completely tailored experience to demonstrate they are being understood. A tailored experience requires driving the customer experience through matching customer attributes based on the valuable customer data accumulated.

Rules Engine provides a simple weighting system to control customer routing. Weights contain logic statements that are used to inspect customer attributes and determine if a rule is active or inactive.

Using the Amazon Connect interface to develop experiences, it can become hard to manage and understanding the connections between each contact flow can be difficult.

Rules Engine provides a connectivity graph which allows you to view and filter the connectivity between rule sets, phone numbers (endpoints) and queues.

To deploy a contact centre using Amazon Connect, customers will often need to resolve multiple challenges including:

When continuously developing, testing and deploying becomes a requirement, multiple environments are created as a result.

This requires implementing automation management, especially when changes need to be replicated across multiple environments to ensure consistency.

With full read-access to the repository source code, customers can easily clone and implement multi-environment deployments by modifying a single configuration file. This also allows the customer to setup CICD for Rules engine infrastructure by integrating pipeline triggers with the cloned Rules engine repository.

In order to test any implementation changes to the customer journey, the easiest and most straightforward way is to manually dial-in to the endpoint, and test each and every experience. This takes significant time and effort and without automation, can be error prone.

Rules Engine provides an interactive interface to simulate endpoints as a text based interaction, providing logs and a range of tooling for debugging purposes.

Interactive sessions are automatically recorded as test scripts that can be saved, edited and replayed to assert continuity of customer experience.

Especially for personalised experiences, data may need to be retrieved from other sources most often via AWS Lambda Functions.

In most cases, business users interacting with Amazon Connect do not have skills or access to develop Lambda functions, hence are reliant on developers to implement, test and deploy the functions before business users can invoke them.

With the extra dependency, productivity can be reduced, time is spent waiting on functions to be developed before the contact flow can be implemented, tested and deployed.

Rules Engine has an inbuilt Echo AWS Lambda function which is commonly used to mock Lambda interactions, allowing customers to simulate retrieving data from external sources.

This enables developers and business users to work in parallel, reducing dependency and increasing productivity and reducing hard dependencies between teams.

Rules Engine is applicable to customers who have the ability to deploy and manage a self-hosted AWS Web application and who require any one of the following:

• A new contact centre or migration from a legacy CX platform
• Support for multiple environment deployments (for example, dev, test and prod)
• Personalisation routing producing tailored customer experiences
• Integration with backend systems

What's different in comparison to building a contact centre using the Amazon Connect user interface and using Rules Engine?

When using the Amazon Connect interface, customer experiences are built across multiple contact flows. Each step of the experience is mapped out using flow blocks, each flow block representing an action, such as get customer input.

With Rules Engine, customer experiences are represented using rulesets, where each ruleset contains at least one rule, and the rule represents an action.

As such, you can map Rules Engine components to the Amazon Connect interface like so:

In the Amazon Connect interface, the experience is created by dragging, dropping and linking blocks on the canvas. The entire contact flow is viewed as one canvas that made up of multiple linked blocks.

Using Rules Engine, the experience is created by adding rules to rulesets. Each rule is created using a simple form, where you select the rule type (such as DTMFInput) using the drop-down menu, and fill in other required inputs for that particular action.

This is different from contact flows, instead of selecting a specific block in the list, you fill in a form with drop-down menus and input boxes. To modify the order of which rules are executed, priorities are assigned, which can be modified as required.

Another differentiation is managing each customer experience. In Amazon Connect, all contact flows are displayed in one list, if you have a large number of contact flows, you will need to navigate through this list using pagination. This becomes difficult to locate flows and visualise connections between different contact flows, resulting in increased time to create and update contact flows.

Within Rules Engine, rulesets are organised into folders, providing you the ability to move and group associated rulesets based on customer experiences. This reduces time to create/update contact flows as all rulesets can be grouped into relevant folders.

Rules Engine supports personalised customer experience through the concept of weighted rules. To create a weight for a particular rule, a customer attribute field (such as Customer.LoyaltyLevel) and an operation (such as equals, less than, etc) are selected. The value of the customer attribute is then compared to an input field value (which may also be dynamically resolved). If the operation evaluates as true, the value of the weight is added to running total. If this total exceeds the activation threshold for the rule, it is activated, or the rule is simply skipped.

For example, a rule to detects high value customers might look like:

Rule A

Activation threshold = 100

Weights

Customer.LoyaltyLevel equals 'gold'
Weight value = 100

Customer.TotalValue greaterthan 200
Weight value = 100

In this case, Rule A will execute if the customer has a Gold loyalty level OR their total value exceeds a threshold.

The activation threshold will be met by either of these criteria and other interesting combinations of customer attribute checking are possible.

To better visualise the relationship between rulesets, rules and weights, refer to the following diagram:

Rulesets are made up of multiple rules, rules are actions that can be optionally triggered based on weight values reaching an activation threshold.

AWS ASEAN Summit 2022 - Attribute-based contact routing in the hands of the business (Level 200)

Download slides

Preview the installation steps detailed below.

Preview Lex bot configuration below.

Learn to work with Weights below.

Prior to any production deployment, AWS recommends undertaking an internal customer security review and risk assessment which considers your organisation's data classification and the logging, storage and necessary security controls based on the sensitivity of capured and loaded data.

Things to consider include but are not limited to:

• Logging of PII data to AWS CloudWatch in integration AWS Lambda functions
• Consideration of your organisation's data classification and how this matches data captured from your customers and loaded through integration functions
• The potential need for encryption at rest for stored customer information in the temporary Amazon DynamoDB state table

Create a new Amazon Connect instance or choose an existing instance.

The Rules Engine has a 1:1 relationship with an Amazon Connect instance.

If you are creating a new instance you may need to raise AWS Limit requests to increase the number of available phone numbers (> 10) and concurrent calls (> 10).

Check out the git repository locally.

For each step, scripts are provided which utilise an environment file to set up the required properties.

If running locally create an AWS Credentials profile using an AWS API key with elevated privileges. Help Link

If running on an EC2 instance or through CodeBuild you may use the instance's provided IAM role or inject AWS credentials via environment variables.

Start by cloning and editing environment files including information about the selected Amazon Connect instance for example for a dev environment:

cp env/example.sh env/dev.sh
cp data/users/example-admin.json data/users/dev-admin.json
cp data/keepwarm/example-keepwarm.json data/keepwarm/dev-keepwarm.json

Keep warm configuration is optional and advises Rules Engine which Lambda functions to keep a ready pool for.

Edit the new environment specific files to fill out the required fields (placeholders are marked internally with 'TBA').

The fields are explained in the table below:

To enable local AWS profile usage you will need to also uncomment out the lines after setting the profile name in env/dev.sh

	export AWS_PROFILE=$profile
	export AWS_SDK_LOAD_CONFIG="true"

Install JQ

Install AWS CLI

Install node.js

Install serverless

Run from the project root location:

npm install -g serverless

Create a deployment bucket for deploying code by editing and executing this script passing your environment name:

./scripts/rules_engine_create_deployment_bucket.sh dev

Deploy the solution by executing this script passing your environment name:

./scripts/rules_engine_serverless_deploy.sh dev

Deploy the sample Amazon Lex V2 bots using the provided script passing your environment name:

cd lex
./build_all.sh dev

Open the output CloudFront url in Chrome:

Build deployment complete, site URL:
https://xxxxx.cloudfront.net

Log in using the edited admin credential API you entered into:

data/admin/dev-admin.json

Successful login should load Connect data and show the home page:

Use the admin screen to create a new admin user and note the API key you will need to log in. Log out and log in as your new admin user.

Ensure the service limits for your Connect instance are set to appropriate levels. For the Rules Engine, it is recommended to have:

Go to the admin page and click on the System health button:

If prompted, use the Repair environment button to install all of the required contact flows.

The system repairing:

The system repaired:

A subsequent health health check shows healthy status:

Contact flow ARNs, phone numbers, operating hours, prompt ARNs, Lambda functions and Lex Bot arns are cached in a DynamoDB config table hourly.

If you want to immediately refresh all cached config use the Refresh cache button to force an immediate cache refresh (useful if you have just claimed new phone numbers or created new queues).

Refreshed cache data is automatically detected and loaded by all clients.

Uses the Rules tab to create and edit rulesets which define your customer's experience.

Use the Graph tab to view an interactive netwrok graph of your rulesets:

Filter your graph to highlight rulesets of interest:

Use the built in holiday editor to create upcoming holidays:

To edit a contact flow or create a new one, use the Amazon Connect console and make the required changes in the visual contact flow editor.

Run the extract flows script passing your environment name:

./scripts/rules_engine_extract_flows.sh dev

This will extract all known contact flows into:

./connect/contactflows/

You will be able to see changed contact flows using git status.

Add new rules contact flows to the bottom of:

rules_engine_extract_flows.sh

Commit the required changes to git and then re-deploy to another environment, checking system health and repairing as required.

To create a pipeline for your RuleEngine instance to auto deploy you enhancements, follow the instructions here.

Read more about extending your solution using Lambda Integration functions here.