DataX Development typically uses the following cooperation models (contracts):

Fixed Price
Time-and-Materials
Time-and-Materials with Not-to-Exceed clause
Milestone-based payment schedule
Monthly Resource-based payment

Fixed-price Contract is one in which the developer agrees to provide the deliverable(s) for an agreed total sum.
When we use fixed-price contract, it means that the customer and DataX Solutions agree in advance on a price that will represent full payment for the services to be provided under the contract.
This way of cooperation is used when project specifications are clearly defined and we are to deliver a product that conforms to the specifications or the completion of specific tasks before payment is made. Payment(s) for satisfactory completion is/are fixed and we receive that/those pre-negotiated, fixed amount(s), regardless of actual costs incurred.

Time-and-materials Contract is one in which the developer is paid to perform work based on the reimbursement of effort and resources.
This way of cooperation provides for acquiring services on the basis of (1) direct labor hours at specified fixed hourly labor rates that include wages, overhead, general and administrative expenses, and profit and (2) materials at cost, including, if appropriate, material handling costs as part of material costs.

Time and Materials with Not-to-Exceed clause is a standard time-and-materials contract, with an additional clause that price will not exceed a certain amount.

Milestone-based payment schedule contributes to better progress monitoring and helps you justify payment. Moreover, visible progress reduces risks. With this kind of contract customer makes payment as soon as a certain milestone of a project is achieved.

Monthly Resource-based payment schedule is the model, when billing is done monthly based on the number and level of resources utilized.

The DataX Development Company cooperates with our customers and partners mainly according to Fixed-price and Time-and-Materials contracts.

However, if you find other method appropriate for you and your project, we will be glad to discuss it. Feel free to contact us.