Your supply chain has two suppliers on paper. In reality, it runs on one.
Most “dual-source” strategies have never actually been tested.
The second supplier is in the system. They passed qualification. And then the primary handles everything for the next three years because they are cheaper, faster, and already set up.
When disruption hits, “we have a backup” turns into a three-week conversation about MOQs, requalification lead times, and whether the secondary supplier can actually handle the volume.
Meanwhile your primary is down, safety stock is burning, and somewhere in the business someone is already promising customers a date they cannot keep.
That is not resilience. That is a list with a false sense of security attached to it.
The issue is that most dual-source strategies were built for normal times. Designed to pass a supply chain or procurement audit, not to absorb a real shock.
The question that rarely gets asked: if we had to switch tomorrow, what would that actually take?
I have seen organisations flip to a backup supplier during a disruption and discover the capacity was never there. The qualification was done at sample volumes. Nobody had checked in two years. The supplier had moved on to other customers.
Real resilience is not a second name on a list.
It is knowing what that supplier can actually ship, at what lead time, without a renegotiation, a requalification, or a capacity scramble.
That is what “dual-source” is supposed to mean.