BusinessAnalyst

Contact me See my work

Nguyễn Đắc Nghĩa

Business Analyst Candidate, Final-year MIS student at NEU.

Hands-on with URD/SRS documentation, BPMN/UML process mapping, and wireframing.

Business AnalysisSystem ModellingWireframing & Prototyping

Business problems, analyzed. Requirements, specified. Products, shaped around real users.

Inspect spec

⊞

Process Playground

24 workflow nodes

◎

Validated Rules

401 acceptance checks

HIS · DFD & 3NF ERD

Inspect spec

On-site Elicitation & 6-Role Scoping

Inspect spec

3-Tap Expense Entry

Orders import validation

42s · TimeoutError fallback at Step 2

SLA threshold alert

2m 11s · Barista KDS ticket escalation rule

Inventory FEFO sync auto-verified

5m · Batch lot deduction on /prescriptions

3View all edge casesBPMN · State

Inspect spec

20+ Figma Screens

Inspect spec

POS & KDS Touch Specification

1-tap modifier matrix & real-time VietQR webhook ticket sync

Inspect spec

3NF ERD & Component Tokens

Standardized clinical tables, status badges & data dictionary

Inspect spec

Multi-Wallet Ledger & MoSCoW MVP

Given / When / Then acceptance criteria suite

Inspect spec

BPMN 2.0 Cross-Functional Swimlanes

End-to-end handoffs across Customer, Cashier, Gateway & KDS

selected cases[01]

Works.

01 / 03•Healthcare / HIS

Pediatric Clinic Management System

Digitizing end-to-end clinical examination, vaccination & pharmacy workflows.

#HealthcareHIS
#SystemAnalysis
#DFD&3NFERD
#URDSRS

6 roles · 7 core clinical modules · 11-entity 3NF ERD

Pediatric Clinic HIS. A unified clinical platform connecting Reception, Pediatricians, Vaccination Nurses, Pharmacy, and Cashiers.

Team of 5 · Business Analyst2025

Pediatric Clinic HIS — Led requirement elicitation and system specification for a multi-role pediatric clinic platform covering patient intake, clinical examination, vaccination workflows, pharmacy dispensing, and billing.

6 Roles

User Roles

7 Modules

Core Modules

11 Entities

3NF Database

59 Pages

Full Report

59-Page SRSBFDDFD L0–L23NF ERDUI Wireframes

BA Deliverables: Modeled Business Function Diagrams (BFD), Context & Level 1–2 DFDs, an 11-entity 3NF relational schema, and authored a 59-page System Requirements Specification.

01Inspect

On-site Elicitation & IFD

Conducted on-site observation and staff interviews to uncover paper-based handoff bottlenecks across clinic rooms.

02Inspect

6 Roles & 7 Modules Scoping

Defined RBAC permissions and functional scope for Reception, Pediatrician, Nurse, Pharmacist, Cashier, and Clinic Manager.

03Inspect

DFD & 11-Entity 3NF ERD

Modeled BFD, Context & Level 1–2 DFDs, and a normalized 3NF relational schema covering prescriptions and vaccine lots.

04Inspect

59-Page System Spec

Delivered complete SRS documentation, UI wireframes for all 7 modules, and a 6-month phased rollout plan.

02 / 03•Mobile App

Personal Finance Management App

Reducing manual expense logging friction with AI receipt scanning.

#MobileApp
#UserStories&AC
#MoSCoW
#Wireframing

OCR receipt scan · MoSCoW MVP · Given/When/Then AC

Personal Finance · Mobile App. Designed for sub-5-second transaction logging and fault-tolerant AI receipt extraction.

Personal Project · Business Analyst2025

Personal Finance · Mobile App — Addressed high user drop-off in manual expense trackers by specifying a 3-tap transaction flow, automated OCR receipt parsing with fallback handling, and real-time budget threshold alerts.

MoSCoW

Prioritization

User Stories & AC

Specs

OCR + Fallback

AI Flow

< 5 Secs

Logging Speed

PRDMoSCoW MatrixUser Stories & ACWireframes & Prototype

BA Deliverables: Prioritized MVP scope with MoSCoW, wrote User Stories & Given/When/Then Acceptance Criteria, mapped OCR exception flows, and built a working prototype.

01Inspect

Problem Framing & MoSCoW

Identified why users abandon expense apps within 2 weeks and prioritized MVP features using MoSCoW.

02Inspect

User Stories & Testable AC

Authored structured User Stories with Given/When/Then Acceptance Criteria for multi-wallet & budget alerts.

03Inspect

AI Receipt Scan & Fallback

Designed OCR extraction states including low-confidence field highlighting and manual correction fallbacks.

04Inspect

End-to-End Flows & Prototype

Built interactive wireframes and deployed a functional web prototype to validate transaction speed.

03 / 03•F&B / POS System

Omnichannel Cafe POS & KDS

Synchronizing counter ordering, KDS ticket queues, and digital pagers.

#F&BRetail
#BPMN2.0
#StateDiagram
#APISpec

BPMN 2.0 swimlanes · Order state machine · KDS sync

Cafe POS & KDS. Real-time choreography between Counter POS, VietQR Webhook, Barista KDS, and Recipe BOM Inventory.

BA Case Study · Business Analyst2025

Cafe POS & KDS — Specified an integrated POS and Kitchen Display workflow that eliminates missed modifiers during peak hours, links VietQR payment webhooks, and automates customer pickup notifications.

BPMN 2.0

Process Model

7 States

Order Lifecycle

VietQR Webhook

Payment

< 4 Mins

Target SLA

URD/SRSBPMN 2.0UML Sequence & State DiagramsPOS/KDS Wireframes

BA Deliverables: Authored URD/BRD/SRS, modeled BPMN 2.0 swimlanes, UML Sequence & 7-State Order State Machine, and designed touch POS/KDS wireframes.

01Inspect

BPMN 2.0 Swimlanes

Mapped cross-role handoffs across Customer, Cashier POS, Payment Gateway, and Barista KDS.

02Inspect

Order State Machine

Defined strict state transitions (Draft → Pending Payment → Queued → In Prep → Ready → Completed/Voided).

03Inspect

Touch POS & KDS UI

Wireframed fast modifier selection and SLA color-coded ticket cards for high-volume baristas.

04Inspect

Webhook & Inventory Rules

Documented recipe BOM auto-deduction rules and idempotent QR payment webhook handling.

tools & engines[02]

My Stack.

Figma

Balsamiq

Draw.io

Lucidchart

Jira

Confluence

Notion

Trello

Claude

Antigravity

SQL

Postman

Microsoft Word

Microsoft Excel

Microsoft PowerPoint

verified credentials[03]

Certifications.

Select a credential to preview or verify online

Coursera · Google Career Certificates•May 2026

Google UX Design Professional Certificate

8 Courses · Empathize, Define, Ideate, Wireframes, Prototypes in Figma & Usability Testing

Coursera · Google Career Certificates•Apr 2026

Google Data Analytics Professional Certificate

9 Courses · Data Cleaning, SQL, Spreadsheets, Tableau & Data-Driven Decision Making

HackerRank•Apr 2026

SQL (Intermediate) Certificate of Accomplishment

Complex Joins, Unions, Aggregations, Subqueries & Relational Query Optimization

IDP Education Ltd•Verified Credential

IELTS Academic — Overall Band 7.5

Proficient English communication for stakeholder interviews, URD/SRS authoring & presentations

Band 7.5

Academic

IDP Verified

“A lot of times, people don’t know
what they want until you
show it to them.”

Steve Jobs