diff --git a/sig-scalability/slos/slos.md b/sig-scalability/slos/slos.md
index de52ccc2b..b418abd18 100644
--- a/sig-scalability/slos/slos.md
+++ b/sig-scalability/slos/slos.md
@@ -9,27 +9,55 @@ you would expect to have some guarantees in those areas.
The goal of this doc is to organize the guarantees that Kubernetes provides
in these areas.
-## What do we require from SLIs/SLOs?
+## How we define scalability?
-We are in the process of extending the number of SLIs ([Service Level Indicators])
-and SLOs ([Service Level Objectives]) built on top of these SLIs to cover more areas
-of the system and user expectations.
+Our scalability definition is built on two concepts:
+- [Service Level Indicators]
+- [Service Level Objectives]
-Our SLIs/SLOs need to have the following properties:
-- They need to be testable
- Ideally, they (SLIs and SLOs) should be measurable in all running clusters,
- but if that isn't possible a benchmark may be enough in some situations.
- That means that not every SLO may be translatable to SLA ([Service
- Level Agreement]).
-- They need to be understandable for users
- In particular, they need to be understandable for people not familiar
- with the system internals, i.e. their formulation can't depend on some
- arcane knowledge.
+We require our SLIs/SLOs to have the following properties:
+- They are precise and well-defined
+ It's extremely important to ensure that both users and us have exactly the
+ same understanding of what we guarantee.
+- They are consistent with each other
+ This is mostly about using the same terminology, same concepts, etc.
+- They are user-oriented
+ First, the SLOs we provide need to be things users really care about.
+ Second, they need to be understandable for people not familiar with the system
+ internals (e.g. their formulation can't depend on some arcane knowledge or
+ implementation details of the system).
+- They are testable
+ Ideally, SLIs/SLOs should be measurable in all running clusters, but if measuring
+ some metrics isn't possible or would be extremely expensive (e.g. in terms
+ of resource overhead for the system), benchmarks sometimes may be enough.
+ That means that not every SLO may be translatable to SLA ([Service Level
+ Agreement]).
-We may also introduce internal(for developers only) SLIs, that may be useful
-for understanding performance characteristic of the system, but for which
-we don't provide any guarantees for users (and thus don't require them to be
-that easily understandable).
+While SLIs are generic (they just define what and how we measure), SLOs provide
+specific guarantees and satisfying them may depend on meeting some specific
+requirements. Specific examples that may visibly affect ability to satisfy them
+are:
+- cluster configuration
+- user of Kubernetes extensibility features
+- load on the cluster.
+
+As a result, we define Kubernetes scalability using "you promise, we promise"
+framework, as following:
+
+ If you promise to:
+- correctly configure your cluster
+- use extensibility features "reasonably"
+- keep the load in the cluster within recommended limits
+
+then we promise that your cluster scales, i.e.:
+- all the SLOs are satisfied.
+
+We are in the process of extending coverage of the system with SLIs and SLOs
+to better reflect user expectations.
+
+Note that may also introduce internal (for developers only) SLIs, that may be
+useful for understanding performance characteristic of the system, but for which
+we will not provide any guarantees for users.
[Service Level Indicators]: https://en.wikipedia.org/wiki/Service_level_indicator
[Service Level Objectives]: https://en.wikipedia.org/wiki/Service_level_objective