The verdict in three sentences
Logistics optimization is not won on the negotiated rider price but on route density: going from 6 to 18 drops per route divides the fixed cost by three. Geographic batching and 2-hour windows cut the cost per drop by 30 % while pushing the success rate to 90 %. In Nairobi, zoning by area (Westlands, Kasarani, Embakasi) is the first profitable reflex.
Optimization levers and their gains
Each lever acts on a specific line item: amortized fixed cost, kilometers avoided, failures removed. Here are the 2026 orders of magnitude.
| Lever | Main effect | Gain on cost/drop | Effort |
|---|---|---|---|
| Route batching | Amortizes fixed cost | -25 to -35 % | Medium |
| 2-hour delivery windows | Reduces failures | -10 to -15 % | Low |
| Zoning by area | Reduces km | -15 to -20 % | Low |
| Route optimization | Reduces time/route | -8 to -12 % | Medium |
| Neighborhood pickup point | Removes home appointment | -40 to -60 % | High |
Route density: the true cost driver
A route's fixed cost (wage, fuel, bike) is spread over the number of drops. The table shows the mechanical effect of density.
| Drops / route | Route fixed cost | Fixed cost / drop | Total cost / drop |
|---|---|---|---|
| 6 drops | 1,200 KES | 200 KES | 340 KES |
| 12 drops | 1,200 KES | 100 KES | 200 KES |
| 18 drops | 1,350 KES | 75 KES | 165 KES |
| 24 drops | 1,500 KES | 63 KES | 145 KES |
Going from 6 to 18 drops cuts the total cost per drop from 340 to 165 KES, i.e. -52 %.
Mini case study
Joseph delivers parcels for shops in Nairobi with 6-drop routes at 340 KES each. By batching orders per area and enforcing two 2-hour windows (morning/afternoon), he reaches 15 drops per route at 165 KES. Over 300 deliveries a month, the saving hits 52,500 KES monthly, about 630,000 KES a year, without hiring a single extra rider.
FAQ
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How many drops per route should you target in Nairobi in 2026 ?
The optimum sits between 12 and 20 drops per route; below 8 the fixed cost stays too high, above 24 the delivery window stretches too far.
Are 2-hour windows worth the constraint ?
Yes: they lift the success rate from 82 % to 90 % and cut redeliveries, for a net 10-15 % gain on cost per drop.
Is zoning by area enough ?
It is the first reflex: serving Westlands in the morning and Kasarani in the afternoon avoids cross-city trips and removes 15-20 % of kilometers.
Do you need route-optimization software ?
Above 15 drops per route, yes: automatic optimization saves 8-12 % of time, reinvested in extra drops.
On-demand delivery or planned routes ?
Planned routes are 30-50 % cheaper; keep on-demand for rush and peaks.
Let's talk about your project. We connect your store to a routing and time-slot engine to deliver denser and cheaper. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.