This refers to the way that a client has structured the payment model of a project. There are two payment structure options on ZehMizeh - the "Project-Based" model and the "Hourly" model.
Project-Based
These projects are for clients who know how much they would like to pay the freelancer for the entire project.
In these projects, clients can commit to the entire budget at once, or in stages. Freelancers and clients agree on how much each stage of the project is worth. When a freelancer finishes a piece of the project, (called a "milestone"), the client releases another piece of the budget until it's completely paid.
The client is charged whatever amount he commits to by ZMZ before the freelancer starts working. This way, the client can't back out of payment.
Hourly
Clients can also design a project to use an hourly payment structure, which has no set budget for completion. In these projects, the freelancer will bill the client as he goes, sending invoices for the hours he's worked, along with the work that's been produced in those hours. The client commits to a specific hourly rate when he hires the freelancer.