diff --git a/docs/overview/assurance.md b/docs/overview/assurance.md
new file mode 100644
index 0000000..fd0da35
--- /dev/null
+++ b/docs/overview/assurance.md
@@ -0,0 +1,151 @@
+# Assurance
+
+Many different factors contribute to the perceived quality, or trust, of an algorithm implementation.
+
+Each implementation will claim different combinations of these factors and provide evidence to support.
+
+
+
+## Assurance Levels
+
+### AL0
+
+Implementation is provided on a best-efforts basis.
+It is likely such implementations are currently being worked on and target
+AL1 at a minimum.
+
+### AL1
+
+Standard Software Engineering best-practice has been followed
+including documenting usage, assumptions, execution of unit tests
+and using .
+
+### AL2
+
+In addition to above, specific consideration has been made to ensure
+the cryptographic correctness of the algorithms. This applies not just to source but to generated/binary code. Tooling/compilers/options details must be provided.
+
+### AL3
+
+In addition to above, implementations at this level have undergone external audit
+or provide a high level of formal proof.
+
+## Checks required for different levels
+
+| Check | Description | AL1 | AL2 | AL3 |
+| -- | -- | -- | -- | -- |
+| DOC-1 | Assumptions | Y | Y | Y |
+| TEST-1 | Unit tests | Y | Y | Y |
+| TEST-2 | Test Vectors | | Y | Y |
+| TEST-3 | Constant Time | | Y | Y |
+| TEST-4 | Fuzzing | | Y | Y |
+| TEST-5 | Static Analysis | Y | Y | Y |
+| TEST-6 | Bounds checking | Y | Y | Y |
+| TEST-7 | Address Sanity | | Y | Y |
+| AUDIT-1 | External audit | | | Y |
+| PROOF-1 | Formal Proof | | | Y |
+
+## Details on checks
+
+### Assumptions Documented
+
+Assumptions and constraints relating to use of the implementation are clearly documented.
+
+#### Evidence
+
+- Links to documentation
+
+### Unit tests
+
+Unit tests used to validate expected behaviour. 90% code coverage required.
+
+#### Evidence
+
+- documentation including how to run
+- explanation of what areas of code are not covered and why
+- Results from CI
+
+### Test Vectors
+
+tested against trusted test vectors such as those covered by NIST's [CAVP program](https://csrc.nist.gov/projects/cryptographic-algorithm-validation-program)
+
+#### Evidence
+
+- Description of test vectors used, and why chosen
+- Results from CI
+
+### Fuzzing
+
+Fuzz testing is used to inject invalid/unexpected test data and to then check the implementation behaves appropriately with no unexpected behaviour.
+
+#### Evidence
+
+- Description of fuzzing tool used
+- Results from CI
+
+### Constant Time
+
+Code is tested to ensure that it executes in constant time, regardless of secret values. For example branching based on secret values, or divisions may cause leakage of secrets.
+
+#### Evidence
+
+- Description of tool used, and why chosen
+- Results from CI
+
+### Static Analysis
+
+Many kinds of checks are run against source code to check for common coding errors. This may include other items on this list.
+
+#### Evidence 
+
+- Description of tool used, and why chosen
+- Types of static analysis performed
+- Results from CI
+
+### Type Safety
+
+Code is checked for appropriate assignment at compile time.
+
+### Bounds checking
+
+#### Evidence
+
+### Address Sanity
+
+This goes beyond bounds checking to also validate all memory accesses and
+catch the use of freed memory.
+
+### Thread Sanity
+
+This checks that code is thread safe and identifies potential race conditions.
+
+### External Audit
+
+Implementation has been verified by a trusted third-party.
+
+#### Evidence Required
+
+- Details of auditing organization & references
+
+
+### Formal Correctness Proof
+
+Formal verification has been done of the implementation against it's specification using mathematical techniques.
+
+#### Evidence Required
+
+
+## Potential tools used to demonstrate assurance
+
+- [CBMC](https://github.com/diffblue/cbmc)
+- [F*](https://www.fstar-lang.org)
+
+## Evidence
+
+Each algorithm should provide a justification for each requirement it meets:
+
+## CBOM
+
+!!! -
+
+## Ontology
diff --git a/docs/overview/choosing-implementation.md b/docs/overview/choosing-implementation.md
index aa7d9c7..252620d 100644
--- a/docs/overview/choosing-implementation.md
+++ b/docs/overview/choosing-implementation.md
@@ -10,8 +10,6 @@ These vary in certain characteristics in terms of:
 * Platform specific optimizations (memory, cpu, ...)
 * Implementation Language
 
-Additionally as sub-projects onboard to pq-code-package they will go through a variety of stages before being ready to use 
+Additionally as sub-projects onboard to pq-code-package they will go through a variety of stages before being ready to use .
 
-More guidance about how to choose an implementation will be added in future. 
-
-For now go to the [list of repositories](../contributing/repositories.md) & view the other pages in this section
+See also the [list of repositories](../contributing/repositories.md) & view the other pages in this section
diff --git a/mkdocs.yml b/mkdocs.yml
index ef06304..559e8a5 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -91,8 +91,9 @@ nav:
     - Purpose: overview/purpose.md
     - Background to ML-KEM: overview/mlkem.md
     - Choosing an implementation: overview/choosing-implementation.md
+    - Assurance: overview/assurance.md
   - Algorithm Implementations:
-    - Implementations and characteristics: implementations/index.md
+    - Implementations: implementations/index.md
     - ML-KEM generic C implementation: implementations/mlkem-c-generic.md
     - ML-KEM optimized C (embedded): implementations/mlkem-c-embedded.md
     - ML-KEM optimized C (aarch64): implementations/mlkem-c-aarch64.md