First, give conclusions that can be used for decision-making
The quotation should be preceded by an understanding of the direction of each interface, the trigger method, the amount of data, authentication, limit flow, thiope, etc., error code and operational consequences. Read-only queries are completely different from the responsibility for the return; the full cost of a mature open platform is different from the cost of the connection of old systems without files. The full cost also includes field mapping, testing data, log monitoring, deployment, reconciliation and maintenance of each other's systems after changes.
What conditions need to be identified before judgement is made?
The same question may have different answers under different business, data and project phases. It is suggested that the following conditions be checked and that the common findings on the web be incorporated into their own projects.
Suggested order of advance
First, we'll be clear about the target and the border.
Interfaces and data are presented by business link, not first valued in quantitative terms.
Validation Key Dependence
Minimum technical validation of high-risk or unknown interfaces.
Development of assessable outcomes
(b) Form interface contracts, field mapping, anomalies and sample acceptances.
Make sure you decide the next step with the real results.
The development linkage, go-live support and long-term maintenance are estimated separately.
How do you understand it in the actual business?
Logistics track queries may only be periodically drawn, while payment interfaces require signature, correction, notification, refund and reconciliation. While both may have only a few addresses, the workload and risk are completely different.
The easiest pit to step on.
If you see the interface document, assume that the test environment and data are available.
The offer does not contain the other party waiting to change the rules
No log and business only key, no difference located on the line
How should we end up receiving and confirming?
The project should deliver interface contracts, field mapping, test records, error and retesting strategies, surveillance alerts, performance results and go-live support plans.
When preparing to communicate with suppliers or internal teams, it is recommended that current processes, representative samples, existing systems, planning time and budget levels be brought. First, the unknown items are clearly marked, and then the decision is made to use diagnostics, PoC, fixed-range projects or ongoing research and development, which is usually more reliable than a direct demand for a price and duration without borders.