Programming languages
                        Idea to product: the working model
                            
                        
    

| Leading indicators | When to use | 
| Positive feedback from qualitative user interviews | During early product concept validation (e.g. prototypes of the user experience) to guide product direction. | 
| A/B tests | 
When there are two or more possible versions of a product element (e.g., button placement on a mobile app, marketing content that drives call to action) and you want a statistically rich sample of customer feedback.  | 
		
| Customer uptake from pilots | 
When validating whether the product or service meets the needs of a specific customer segment. The early definition of a pilot should not include all the ‘bells and whistles’ of the full product features, instead it should focus on the key value proposition to the customer. | 
		
| Ratio of hypotheses proven correct/incorrect | To obtain a sense for whether the teams are validating the right opportunity. If the ratio is low (more hypotheses are proving incorrect) this should identify a change in approach, for example, is it time to redefine the value proposition? Look to a longer horizon of future value? (is the market ready for this type of innovation?), validate with a different customer segment? | 
| Lagging indicators | When to use it | 
| Profit | Evaluating the long-term commercial viability of a product | 
| Revenue | Evaluating near-term commercial viability of a product | 
| Market Share | Validating share of potential market opportunity | 
| Net Promoter Score | Gauge loyalty of customers | 
| Customer Lifetime value | Understanding the value a customers have brought to the organization during the relationship (measured by net profit for any given customer). | 
Disclaimer: The statements and opinions expressed in this article are those of the author(s) and do not necessarily reflect the positions of Thoughtworks.