This is the third in a series describing the process of finding the right OSS solution for your specific needs and getting estimated pricing to help you build a business case.
The first post described the overall OSS selection process we use. The second described the way we poll the market and prepare a short-list of OSS products / vendors based on current capabilities.
Once you’ve prepared the short-list it’s time to get into specifics. We generally do this via a PoC (Proof of Concept) phase with the short-listed suppliers. We have a few very specific principles when designing the PoC:
- We want it to reflect the operator’s context so that they can grasp what’s being presented (which can be a challenge when a vendor runs their own generic demos). This “context” is usually in the form of using the operator’s device types, naming conventions, service types, etc. It also means setting up a network scenario that is representative of the operator’s, which could be a hypothetical model, a small segment of a real network, lab model or similar
- PoC collateral must clearly describe the PoC and related context. It should clearly identify the important scenarios and selection criteria. Ideally it should logically complement the collateral provided in the previous step (ie the requirement gathering)
- We want it to focus on the most important conditions. If we take the 80/20 rule as a guide, will quickly identify the most common service types, devices, configurations, functions, reports, etc that we want to model
- Identify efficacy across those most important conditions. Don’t just look for the functionality that implements those conditions, but also the speed at which they can be done at a scale required by the operator. This could include bulk load or processing capabilities and may require simulators (or real integrations – see below) to generate volume
- We want it to be a simple as is feasible so that it minimises the effort required both of suppliers and operators
- Consider a light-weight integration if possible. One of the biggest challenges with an OSS is getting data in and out. If you can get a rapid integration with a real network (eg a microservice, SNMP traps, syslog events or similar) then it will give an indication of integration challenges ahead. However, note the previous point as it might be quite time-consuming for both operator and supplier to set up a real-time integration
- Take note of the level of resourcing required by each supplier to run the PoC (eg how many supplier staff, server scaling, etc.). This will give an indication of the level of resourcing the operator will need to allocate for the actual implementation, including organisational change management factors
- Attempt to offer PoC platform consistency so that all operators are on a level playing field, which might be through designing the PoC on common devices or topologies with common interfaces. You may even look to go the opposite way if you think the rarity of your conditions could be a deal-breaker
Note that we tend to scale the size/complexity/reality of the PoC to the scale of project budget out of consideration of vendor and operator alike. If it’s a small project / budget, then we do a light PoC. If it’s a massive transformation, then the PoC definitely has to go deeper (ie more integrations, more scenarios, more data migration and integrity challenges, etc)…. although ultimately our customers decide how deep they’re comfortable in going.
Best of luck and feel free to contact us if we can assist with the running of your OSS PoC.Read the Passionate About OSS Blog for more or Subscribe to the Passionate About OSS Blog by Email