S&OP and IBP Process

Sales & Operations Planning (S&OP) is a monthly cross-functional process that aligns demand signals, supply capability, and financial targets into one agreed operating plan. Integrated Business Planning (IBP) is the strategic evolution — extending the horizon to 24–36 months and connecting S&OP outputs directly to the annual operating plan (AOP) and strategic plan.

The 5-Step S&OP Cycle

Runs monthly, typically over 3–4 weeks:

Step	Timing	Participants	Output
1. Product review	Week 1	Product management, marketing	New product launch plan, portfolio changes, discontinuations
2. Demand review	Week 1–2	Sales, marketing, demand planning	Consensus unconstrained demand forecast
3. Supply review	Week 2–3	Operations, procurement, logistics	Constrained supply plan; capacity gaps identified
4. Financial reconciliation	Week 3	Finance, supply chain	Gap analysis: plan vs. budget vs. latest estimate
5. Executive S&OP	Week 4	C-suite + functional VPs	Decision on gaps; approved plan published

The executive S&OP meeting is a decision forum, not a status report. If it runs as a reporting meeting, the process has failed.

IBP: The Evolution

IBP (Oliver Wight definition) extends S&OP in three ways:

1. Longer horizon: 24–36 months vs. 12–18 for S&OP
2. Strategic linkage: IBP outputs feed the AOP and 3-year strategic plan (catchball with Hoshin — see CI Program Governance)
3. Financial integration: Finance is a full participant, not a recipient; the financial plan is reconciled in real time, not post-process

Major IBP software platforms: Kinaxis RapidResponse, o9 Solutions, SAP IBP, Blue Yonder (JDA) Luminate Planning.

Key Performance Metrics

Metric	Definition	Best-in-Class
Forecast accuracy (MAPE)	Mean absolute % error vs. actuals	<15% at SKU/week
Forecast bias	Systematic over/under-forecast	±2%
Schedule adherence	% of supply plan executed as planned	>95%
Inventory days on hand	Days of forward cover	Category-specific
Plan stability index	% of week-2 plan unchanged by week-4	>80%

Common Failure Modes

Failure	Root Cause	Fix
S&OP is a reporting meeting	Decisions made offline before the meeting	Pre-work is preparation, not pre-decision
Finance disconnected	Finance receives the plan but doesn’t co-own it	Finance joins Week 3 reconciliation as an equal
Spreadsheet process	No single version of truth; reconciliation consumes cycle time	Invest in planning platform
Sales sandbagging	Sales submits low forecasts to manage expectations	Separate demand forecast from sales quota
Supply plan always “constrained by everything”	No prioritization framework	Constraint ranking and trade-off logic

Maturity Model

Stage	Characteristics
Reactive	No formal S&OP; firefighting mode; demand and supply plans disconnected
Anticipatory	Monthly process exists; demand and supply reviewed separately
Collaborative	Cross-functional consensus; one number; financial reconciliation happens
Orchestrated	IBP: 24-month horizon; AOP-linked; scenario planning; board-level visibility

Most organizations sit at Stage 2 (anticipatory). Moving from Stage 2 to Stage 3 requires organizational change, not just a software upgrade.

S&OP in the DC Context

The S&OP plan directly drives warehouse operations:

• Staffing plan: Approved volume forecast feeds the labor model (see Labor Modeling) — headcount plans and temp agency contracts are set against the S&OP volume curve
• Inbound scheduling: Supply plan drives container/trailer arrival scheduling; dock capacity is a constraint input to the supply review
• Slot reservation: DC space allocation by SKU family is set against the S&OP inventory plan
• Throughput validation: Peak volume from the demand plan is tested against DC throughput capacity (see Throughput Analysis); gaps trigger investment or constraint decisions in executive S&OP