DataStream Apps

Event-driven application reporting for transaction flows and interaction patterns—mapped with the people who run the desk, then delivered as packs your team can refresh.

Flagship engagement

Transaction Flow Reporting

We inventory the events along the paths that carry money, obligations, and customer outcomes. You receive flow diagrams, a scheduled reporting pack, and a handoff guide—not a subscription portal.

Typical work runs three to six weeks from scope to first stable cycle, with workshops remote or on-site in Busan.

Review scope and inclusions
Analyst reviewing charts and notes at a desk
Related work

Engagements that fit beside the main pack

Short reviews and workshops when definitions are unsettled, or a retainer when production should continue after handoff.

Team discussing notes around a conference table

Interaction Pattern Review

A focused review of how users and systems interact across key journeys, highlighting friction points and inconsistent event capture.

1–2 weeks · Fixed fee per journey set

Facilitator leading a workshop with sticky notes on a board

Event Definition Workshop

A facilitated session that settles shared names, meanings, and ownership for the events behind your transaction reporting.

Half-day or full-day session · Per workshop session

Person organizing documents and a calendar on a wooden desk

Reporting Cadence Retainer

Ongoing production of your agreed event-driven reports on a weekly or monthly schedule after an initial engagement.

Month-to-month after a completed reporting engagement · Monthly retainer tied to report count and cadence

From recent work

What clients notice after the first packs

“They mapped our checkout and refund paths in language our floor supervisors actually use. The first weekly pack still needed two definition tweaks—we expected that—but by week three the exception list matched what the desk was seeing.”

Hyejin Park, Operations lead, Busan retail group — Transaction Flow Reporting Engagement

“The interaction pattern review was short and a bit blunt about our duplicate ‘submit’ events. That honesty saved us from building reports on noise. We commissioned the full engagement afterward.”

Minho Choi, Product manager, payments team — Interaction Pattern Review

Read client stories · How an engagement runs