After a route plan finishes, you may see orders that weren't placed on any route. They are counted as Unplanned at the bottom of the plan (and as unscheduled orders in the route plan list). This is normal on a first run: it means the optimizer couldn't fit them in under your current rules.
The job is to find which rule is holding them back, relax it, and run the plan again.
Before you start
Change one thing at a time and re-run the plan after each change. That way you always know which change made the difference. Work through the causes below in this order.
1. Maximum time per route is too low
This is the most common cause. If orders don't fit within the time limit, the optimizer leaves them out.
In your rule set, open Vehicle groups, open the group, and raise Max time per route (in minutes), for example from 480 to 600.
The limit includes loading time and breaks, not only driving. A limit of 600 minutes is therefore not 10 hours of driving.
2. Delivery time windows are too tight
An order can be left out if adding it would mean arriving after its latest delivery time.
You don't need to re-upload your orders with wider windows. In the rule set, open General and go to Time & distance adjustments. Increase Extension of latest arrival time to let the optimizer arrive later than the stated time, for example by 30 or 60 minutes. This is often enough to fit the last few stops. If orders are being left out because they'd arrive too early, Extension of earliest arrival time works the same way in the other direction.
3. A capacity limit is reached
Check the vehicle group's Max number of colli per route, Max number of stops per route, Max weight per route and Max volume per route. If your planned routes are hitting one of these ceilings, orders spill over.
Compare the stop and colli counts on your planned routes with the limits to confirm which one it is before you raise anything.
4. There aren't enough vehicles
If your fleet is deliberately limited and the total volume is more than those vehicles can carry within their limits, add another vehicle group or increase the vehicle count.
Repeat until nothing is unplanned
Keep going until the plan shows zero unplanned orders. Then do a sanity check. A route that is valid on paper, for example 10 hours with a single 30-minute break, may still be too long for a real shift. The goal is routes your drivers can actually run, not just a zero.
Move a few stops by hand
For a handful of leftover stops close to an existing route, you can drag them from the unplanned stops above the routes onto a route in the position you want. The system calculates the impact for you. See Drag & Drop: Easily Adjust and Optimize Your Routes.
For anything that keeps happening, fix the rule set instead of moving stops one by one, so the next plan gets it right on its own.
Next step: fine-tune the costs
With every order planned, you can start tuning costs to match your cost model:
Planning too many routes? Raise Cost of a new route.
Want less total driving time? Raise Cost of time.
Want shorter distances? Raise Cost of distance driven.
See Route Planning with Rule Sets for the full list of settings.