Measure the effect of your client loyalty event across several dimensions. Quantitative: track the repeat-purchase rate and the average order value. Also look at the retention rate, the number of clients who don't switch to a competitor. Qualitative: run a survey on satisfaction, the experience of the relationship and the recommendation rate (NPS). Behavioural: track mentions on social media, referrals and sales opportunities. Sentiment: check via email or phone contact how clients experienced the event. Combine hard data from sales with soft data from feedback. Expect a rise of 10 to 20 per cent in repeat purchases over the six months after the event, with good delivery. Live Impact sets up a measurement framework.