Engagement with a distribution center or warehouse design consultant lives or dies on the quality of the inputs it starts with. A warehouse design consultants are often brought in with a firm deadline and a clear mandate, only to spend the first several weeks chasing down order histories, reconciling conflicting inventory counts, and waiting on decisions that no one inside the organization has actually made yet. The design work itself is rarely the bottleneck. The bottleneck is readiness.
The good news is that most of what a consultant needs is already sitting inside your systems and your leadership team. It simply has not been gathered, cleaned, or agreed upon. Assembling it before the engagement begins can compress a project timeline meaningfully and, just as importantly, it produces a better design because the consultant is working from reality rather than from assumptions. Below is a practical guide to the data and the decisions worth having in hand before the first working session.
Order and Shipment History
The single most valuable input is a clean, detailed history of what has actually moved through your operation. At minimum this means order line detail covering a full year, so that seasonality is captured rather than smoothed away. Each record should include the order date, the ship date, the items and quantities, the units of measure, and the destination type. A year of history reveals your true peak, your true mix, and the shape of demand that any design has to accommodate.
Twelve months is the floor, not the ideal. Where it is available, twenty-four or thirty-six months of history allows a consultant to distinguish a genuine growth trend from a single unusual year. If your business has changed materially, through an acquisition, a new channel, or a discontinued product line, flag those events so the data can be interpreted correctly rather than taken at face value.
Item Master and Product Characteristics
Order history tells you what moved. The item master tells you what those things physically are. A design that ignores dimensions and weight will produce storage media and pick strategies that do not fit the product. For every active SKU the consultant needs the case dimensions, the case weight, the units per case, the cases per pallet, and the storage requirements such as temperature control, hazardous material handling, or security. Velocity classification, if you already maintain it, is helpful, but a consultant can derive it from clean order history.
Item master data is notorious for being incomplete or stale. Many organizations discover during a design engagement that a meaningful share of their SKUs have missing or clearly wrong dimensional data. Auditing and correcting this before the project starts is one of the highest leverage things you can do, because every downstream calculation depends on it.
Providing Inventory Profile For Your Warehouse Design Consultant
Beyond individual item data, the warehouse design consultant needs a picture of your inventory as it sits today. A snapshot of on hand quantities by SKU and by location, ideally captured at a representative point in the year, shows how much you carry and how it is distributed. This drives storage sizing directly. If your inventory swings dramatically with the seasons, a single snapshot is misleading, so provide snapshots from both a peak period and a trough.
It is worth being honest here about slow moving and obsolete inventory. Designing storage around stock that should be liquidated wastes space and money. A frank accounting of what is truly active versus what is sitting idle allows the design to be sized for the business you want rather than the clutter you have accumulated.
Labor and Operational Data
A facility design is also a labor design. Current headcount by function, shift patterns, productivity rates, and turnover figures all shape decisions about how much automation makes sense and how work should flow. High turnover, for instance, argues for simpler processes and shorter training curves, which in turn influences layout and technology choices. If you track cost per unit handled or lines picked per hour, bring those numbers. They establish the baseline that any new design will be measured against.
Growth Projections and Business Strategy
Data describes where you have been. Design has to serve where you are going. This is where the most consequential decisions live, and it is where organizations are most often unprepared. Before the engagement, leadership should align on a realistic growth forecast, expressed in the same terms as your operational data, so it can be modeled rather than debated. Volume growth, SKU proliferation, new channels such as direct to consumer, and any planned changes to the service promise all belong here.
These are not questions a consultant can answer for you, and pretending they are settled when they are not will surface later as expensive rework. It is far better to hold the hard conversation about strategic direction before the design begins than to discover midway through that the executive team has two different futures in mind.
Constraints and Non-Negotiables for A Warehouse Design Consultant
Every design operates inside boundaries. Naming them early prevents wasted effort on options that were never viable. Relevant constraints include the budget envelope, the target timeline for going live, whether you are working within an existing building or greenfield, ceiling heights and column spacing if the building is fixed, any corporate mandates around sustainability or safety, and technology standards your organization has already committed to. A consultant would rather know these on day one than present a beautiful concept that violates a constraint you assumed was obvious.
A Decision Maker and a Point of Contact
Finally, readiness is not only about data. Every engagement needs a clearly identified decision maker with the authority to make calls when tradeoffs arise, and it needs a day-to-day point of contact who can retrieve information and answer questions quickly. Projects stall when the consultant has to route every question through a committee or wait days for a simple data pull. Deciding in advance who holds these two roles removes a common and entirely avoidable source of delay.
The Payoff Of A Warehouse Design Consultant
None of these inputs are exotic. What separates a project that finishes on time from one that drags is whether this material is assembled, cleaned, and agreed upon before the warehouse design consultant walks in the door. The organizations that treat preparation as the first phase of the project, rather than as an afterthought, consistently get to a better answer faster. Time spent getting ready is not overhead. It is the foundation the entire design rests on.
About OPSdesign
OPSdesign Consulting provides vendor independent warehouse, distribution center, and supply chain design services. Because we earn no commissions and sell no equipment, our recommendations serve only your operation. If you are preparing for a design engagement and want a partner focused solely on your interests, we would welcome the conversation.
