Voluntary business offers joint purchasing or marketing to a common organization
of small and medium-sized merchants in similar industries.
The voluntary chain, a successful model in the global large retail industry,
is widely adopted by most companies in the United States, with SYSCO being a prime example.
A domestic example is the 'Onnuri Pharmacy' chain.

Enhances the profitability of operators by providing price-competitive direct trade fresh foods.
Increases sales and profitability per store and establishes a sustainable SCM (Supply Chain Management)
through order and sustainable delivery and order system.

Sysco, from its early days, expanded rapidly by collaborating
with local distributors across North America and leading a nationwide IT ordering and supply system.
Currently, Sysco operates its food distribution business in over 10 countries,
serving more than 390,000 establishments, including restaurants, hospitals, and hypermarkets.

Onnuri H&C operates the pharmacy chain 'Onnuri Pharmacy' and the drugstore chain 'Wellbeing Square Onnuri,'
starting in 1991 with 120 members and now boasting 1,865 franchises.
Out of these, 1,753 are Onnuri Pharmacies and 112 are Wellbeing Square Onnuri drugstores,
holding a significant number of pharmacy supply points.

Onnuri has secured many product supply franchisees, offering various advantages in pharmacy management.
Most importantly, by supplying a variety of competitive products such as over-the-counter drugs
and health supplements, the 'Onnuri Logistics System' enables increased store profitability
and enhanced product operation capabilities for member pharmacies.