https://tilsim.io/blog/ The mechanics of TV buying and audience data — big guides, and the deep dives that support them. en https://tilsim.io/blog/daily-percentages-average-vs-period-rating.html https://tilsim.io/blog/daily-percentages-average-vs-period-rating.html Wed, 19 Aug 2026 08:00:00 +0000 Averaging daily TV ratings and dividing by the number of days biases the period figure. Here is why percentages need universe weighting — and how to check it. https://tilsim.io/blog/active-months-come-from-the-calculation.html https://tilsim.io/blog/active-months-come-from-the-calculation.html Wed, 19 Aug 2026 08:00:00 +0000 Why a four-month flight can report three active months: a month counts when TRP actually lands in it. How flight shape and intensity decide, and why it matters. https://tilsim.io/blog/media-planning-tools-what-to-compare.html https://tilsim.io/blog/media-planning-tools-what-to-compare.html Wed, 19 Aug 2026 08:00:00 +0000 A buyer's checklist for comparing media planning tools: reproducibility, transparent calculation chains, local deal mechanics, raw data access, and post-buy proof. https://tilsim.io/blog/budget-stuck-between-discount-tiers.html https://tilsim.io/blog/budget-stuck-between-discount-tiers.html Mon, 10 Aug 2026 08:00:00 +0000 Volume discount depends on budget, budget depends on discount. See how the loop oscillates between tiers, and why the rule must be fixed before the deal. https://tilsim.io/blog/prime-time-uplift-whole-deal.html https://tilsim.io/blog/prime-time-uplift-whole-deal.html Mon, 10 Aug 2026 08:00:00 +0000 Prime-time uplift is a deal-level multiplier, not a line on prime inventory. See why 15% uplift with 55% off-prime money creates an 8.25% gap in TRP volume. https://tilsim.io/blog/tv-planning-target-rating-to-budget.html https://tilsim.io/blog/tv-planning-target-rating-to-budget.html Mon, 10 Aug 2026 08:00:00 +0000 TV planning runs two conversions on one CPP chain: rating to budget, budget to rating. See the multipliers, the iteration loop, and where plans quietly break. https://tilsim.io/blog/15-second-spot-duration-coefficient.html https://tilsim.io/blog/15-second-spot-duration-coefficient.html Tue, 04 Aug 2026 08:00:00 +0000 Compare a 15-second spot vs 30-second TRP: why a 0.6 duration coefficient is not half, how it changes spot counts, and when interpolation matters in practice. https://tilsim.io/blog/media-buying-software-small-agencies.html https://tilsim.io/blog/media-buying-software-small-agencies.html Tue, 04 Aug 2026 08:00:00 +0000 A practical test of media buying software for small agencies: calculation accuracy, raw audience data, post-buy reconciliation, and client-ready reporting. https://tilsim.io/blog/prime-offprime-money-share-vs-ratings.html https://tilsim.io/blog/prime-offprime-money-share-vs-ratings.html Tue, 04 Aug 2026 08:00:00 +0000 Prime time share in TV buying changes with the unit: a 30% off-prime money split can become 36.4% of ratings after discount, then shift with affinity. https://tilsim.io/blog/media-planning-software-what-it-computes.html https://tilsim.io/blog/media-planning-software-what-it-computes.html Fri, 31 Jul 2026 08:00:00 +0000 See the seven calculations media planning software must handle, from duration-weighted TRP and affinity through CPP, discount tiers, and execution layers. https://tilsim.io/blog/seller-discounts-multiply-not-add.html https://tilsim.io/blog/seller-discounts-multiply-not-add.html Fri, 31 Jul 2026 08:00:00 +0000 Why do seller discounts multiply? See why 20% and 10% combine to 28%, how the error travels through CPP, and why discount tiers need iteration at boundaries. https://tilsim.io/blog/tv-budget-discount-iteration-loop.html https://tilsim.io/blog/tv-budget-discount-iteration-loop.html Fri, 31 Jul 2026 08:00:00 +0000 TV budget discount tier iteration solves a circular deal: budget sets the discount, discount changes the budget, and boundary cases need a fixed rule.